[internal/release/3.1.4xx] Update dependencies from dnceng/internal/d…

…otnet-aspnetcore

[internal/release/3.1.1xx] Update dependencies from dnceng/internal/d…

…otnet-aspnetcore

[internal/release/3.1.4xx] Update dependencies from dnceng/internal/d…

…otnet-aspnetcore

Merged PR 14951: [internal/release/3.1.1xx] Update dependencies from …

…dnceng/internal/dotnet-aspnetcore

This pull request updates the following dependencies

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## From https://dev.azure.com/dnceng/internal/_git/dotnet-aspnetcore
- **Subscription**: a7f03436-8ebd-46f6-575c-08d76e1d56cb
- **Build**: 20210513.5
- **Date Produced**: 5/13/2021 7:06 PM
- **Commit**: 7e8bbb70b266b2fdaf0b11ec47fb3077761fb6bf
- **Branch**: refs/heads/internal/release/3.1

[DependencyUpdate]: <> (Begin)

- **Updates**:
  - **Microsoft.AspNetCore.DeveloperCertificates.XPlat**: [from 3.1.16-servicing.21263.1 to 3.1.16-servicing.21263.5][1]

[1]: https://dev.azure.com/dnceng/internal/_git/dotnet-aspnetcore/branches?baseVersion=GCb7185f0&targetVersion=GC7e8bbb7&_a=files

[DependencyUpdate]: <> (End)

[marker]: <> (End:a7f03436-8ebd-46f6-575c-08d76e1d56cb)

[internal/release/3.1.4xx] Update dependencies from dnceng/internal/d…

…otnet-aspnetcore

 - Updated NuGet.config

[internal/release/3.1.1xx] Update dependencies from dnceng/internal/d…

…otnet-aspnetcore

 - Updated NuGet.config

Merge in 'release/2.1.8xx' changes

Merge in 'release/2.1.5xx' changes

[internal/release/3.1.4xx] Update dependencies from dnceng/internal/d…

…otnet-aspnetcore

Merge in 'release/2.1.8xx' changes