Release 9.2.1

[apiarian-datadog]

Release 9.2.1

Changelog and version bump for the 9.2.1 NuGet release.

Included changes

• [BUGFIX] Prevent named pipe write failures from causing unbounded thread growth. The telemetry timer now reschedules itself after each round instead of spawning a new thread every 10s, and backs off after send failures. See SLES-2913: prevent named pipe failures from eating the whole thread pool #231.

Checklist

• Changelog entries are accurate
• Version numbers are correct
• PR approved and ready to merge

Once merged, run /publish-release to tag, build, and push to NuGet.

[apiarian-datadog]

(holding this release until Monday)