Upstream update: Review official dotnet/skills upstream update

[github-actions]

Automation detected pending upstream changes for Review official dotnet/skills upstream update.

• Issue key: official-dotnet-skills-upstream
• Affected skills: analyzing-dotnet-performance, android-tombstone-symbolication, binlog-failure-analysis, binlog-generation, build-parallelism, build-perf-baseline, build-perf-diagnostics, check-bin-obj-clash, clr-activation-debugging, code-testing-agent, configuring-opentelemetry-dotnet, convert-to-cpm, (+60 more)
• Pending upstream watches: 1

Pending upstream sources:

• dotnet-skills-main-head | http_document | dotnet/skills main branch
  • Source: https://api.github.com/repos/dotnet/skills/commits/main
  • Current value: W/"895d4e14bb414ef737993f7f35fe99a374e6442b20ebb19a60513088a2e02bbf"
  • Detail: ETag W/"895d4e14bb414ef737993f7f35fe99a374e6442b20ebb19a60513088a2e02bbf"

Why this matters:

• Review external-sources/vendir.lock.yml, sync external-sources/upstreams/dotnet-skills via vendir, rerun scripts/import_external_catalog_sources.py, then regenerate catalog outputs and verify the imported official skills and agents.

Suggested follow-up:

• Review the upstream release notes or documentation diff
• Update the affected files under skills/
• Update README.md if framework coverage or guidance changed
• Close this issue after the catalog has been refreshed