This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [google.golang.org/grpc](https://togithub.com/grpc/grpc-go) | require | minor | `v1.68.0` -> `v1.69.0` |

---

### Release Notes

<details>
<summary>grpc/grpc-go (google.golang.org/grpc)</summary>

### [`v1.69.0`](https://togithub.com/grpc/grpc-go/releases/tag/v1.69.0): Release 1.69.0

[Compare Source](https://togithub.com/grpc/grpc-go/compare/v1.68.1...v1.69.0)

### Known Issues

-   The recently added `grpc.NewClient` function is incompatible with forward proxies, because it resolves the target hostname on the client instead of passing the hostname to the proxy. A fix is expected to be a part of grpc-go v1.70. ([#&#8203;7556](https://togithub.com/grpc/grpc-go/issues/7556))

### New Features

-   stats/opentelemetry: Introduce new APIs to enable OpenTelemetry instrumentation for metrics on servers and clients ([#&#8203;7874](https://togithub.com/grpc/grpc-go/issues/7874))
-   xdsclient: add support to fallback to lower priority servers when higher priority ones are down ([#&#8203;7701](https://togithub.com/grpc/grpc-go/issues/7701))
-   dns: Add support for link local IPv6 addresses ([#&#8203;7889](https://togithub.com/grpc/grpc-go/issues/7889))
-   The new experimental `pickfirst` LB policy (disabled by default) supports Happy Eyeballs, interleaving IPv4 and IPv6 address as described in [RFC-8305 section 4](https://www.rfc-editor.org/rfc/rfc8305#section-4), to attempt connections to multiple backends concurrently. The experimental `pickfirst` policy can be enabled by setting the environment variable `GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST` to `true`. ([#&#8203;7725](https://togithub.com/grpc/grpc-go/issues/7725), [#&#8203;7742](https://togithub.com/grpc/grpc-go/issues/7742))
-   balancer/pickfirst: Emit metrics from the `pick_first` load balancing policy ([#&#8203;7839](https://togithub.com/grpc/grpc-go/issues/7839))
-   grpc: export `MethodHandler`, which is the type of an already-exported field in `MethodDesc` ([#&#8203;7796](https://togithub.com/grpc/grpc-go/issues/7796))
    -   Special Thanks: [@&#8203;mohdjishin](https://togithub.com/mohdjishin)

### Bug Fixes

-   credentials/google: set scope for application default credentials ([#&#8203;7887](https://togithub.com/grpc/grpc-go/issues/7887))
    -   Special Thanks: [@&#8203;halvards](https://togithub.com/halvards)
-   xds: fix edge-case issues where some clients or servers would not initialize correctly or would not receive errors when resources are invalid or unavailable if another channel or server with the same target was already in use . ([#&#8203;7851](https://togithub.com/grpc/grpc-go/issues/7851), [#&#8203;7853](https://togithub.com/grpc/grpc-go/issues/7853))
-   examples: fix the debugging example, which was broken by a recent change ([#&#8203;7833](https://togithub.com/grpc/grpc-go/issues/7833))

### Behavior Changes

-   client: update retry attempt backoff to apply jitter per updates to [gRFC A6](https://togithub.com/grpc/proposal/blob/master/A6-client-retries.md). ([#&#8203;7869](https://togithub.com/grpc/grpc-go/issues/7869))
    -   Special Thanks: [@&#8203;isgj](https://togithub.com/isgj)
-   balancer/weightedroundrobin: use the `pick_first` LB policy to manage connections ([#&#8203;7826](https://togithub.com/grpc/grpc-go/issues/7826))

### API Changes

-   balancer: An internal method is added to the `balancer.SubConn` interface to force implementors to embed a delegate implementation. This requirement is present in the interface documentation, but wasn't enforced earlier. ([#&#8203;7840](https://togithub.com/grpc/grpc-go/issues/7840))

### Performance Improvements

-   mem: implement a `ReadAll()` method for more efficient `io.Reader` consumption ([#&#8203;7653](https://togithub.com/grpc/grpc-go/issues/7653))
    -   Special Thanks: [@&#8203;ash2k](https://togithub.com/ash2k)
-   mem: use slice capacity instead of length to determine whether to pool buffers or directly allocate them ([#&#8203;7702](https://togithub.com/grpc/grpc-go/issues/7702))
    -   Special Thanks: [@&#8203;PapaCharlie](https://togithub.com/PapaCharlie)

### Documentation

-   examples/csm_observability: Add xDS Credentials and switch server to be xDS enabled ([#&#8203;7875](https://togithub.com/grpc/grpc-go/issues/7875))

### [`v1.68.1`](https://togithub.com/grpc/grpc-go/releases/tag/v1.68.1): Release 1.68.1

[Compare Source](https://togithub.com/grpc/grpc-go/compare/v1.68.0...v1.68.1)

### Bug Fixes

-   credentials/alts: avoid SRV and TXT lookups for handshaker service to work around hangs caused by buggy versions of systemd-resolved. ([#&#8203;7861](https://togithub.com/grpc/grpc-go/issues/7861))

### Dependencies

-   Relax minimum Go version requirement from `go1.22.7` to `go1.22`. ([#&#8203;7831](https://togithub.com/grpc/grpc-go/issues/7831))

</details>

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This PR was created by a scheduled workflow to regenerate the Go code from `plugin-pb`.

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---


## [1.26.1](v1.26.0...v1.26.1) (2024-12-17)


### Bug Fixes

* **deps:** Update module google.golang.org/grpc to v1.69.0 ([#447](#447)) ([43aeb88](43aeb88))
* Generate Go Code from `plugin-pb` ([#449](#449)) ([c1a8fa3](c1a8fa3))

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