Merge pull request DataDog#9983 from DataDog/kaylyn/postman-1

adding that you need a Postman account as a prereq

Fix spelling mistake? (DataDog#9974)

I believe it is supposed to be `ddtrace-run` not `dd-trace-run`

https://ddtrace.readthedocs.io/en/stable/advanced_usage.html#ddtrace-run

Update to canonical hostname selection hierarchy (DataDog#9981)

* Update to canonical hostname selection hierarchy

Hostnames that start with ip or domu are automatically skipped in favor of other hostnames even if they're set in the datadog.yaml or DD_HOSTNAME environment variable.  

https://github.com/DataDog/datadog-agent/blob/master/docs/agent/hostname_force_config_as_canonical.md

* Update how-datadog-agent-determines-the-hostname.md

Preprocessing JSON logs reorg (DataDog#9943)

* reorg of logs processing and pipelines pages

* Apply suggestions from code review

Co-authored-by: ruthnaebeck <[email protected]>

* Apply suggestions from code review

Co-authored-by: ruthnaebeck <[email protected]>

[rum] document event dismissal in browser sdk (DataDog#9971)

Style fixes (DataDog#9978)

Regenerate client from commit 9a30209 of spec repo (DataDog#9976)

Co-authored-by: ci.datadog-api-spec <[email protected]>

add template variable selection reflected in dashboard URLs (DataDog#…

…9977)

* modified service, latency pages

* updated distribution page

* add template var URL reflection

Update getting_started.md (DataDog#9972)

Change X to ✓ on manifest template table (DataDog#9934)