Bump procfs from 0.11.0 to 0.11.1 in /src/agent

Bumps [procfs](https://github.com/eminence/procfs) from 0.11.0 to 0.11.1.
- [Release notes](https://github.com/eminence/procfs/releases)
- [Commits](eminence/procfs@v0.11.0...v0.11.1)

---
updated-dependencies:
- dependency-name: procfs
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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