build(deps): bump gevent from 25.5.1 to 25.8.1 in /docker/commvault (#39855)

Bumps [gevent](https://github.com/gevent/gevent) from 25.5.1 to 25.8.1.
- [Release notes](https://github.com/gevent/gevent/releases)
- [Changelog](https://github.com/gevent/gevent/blob/master/docs/changelog_pre.rst)
- [Commits](gevent/gevent@25.5.1...25.8.1)

---
updated-dependencies:
- dependency-name: gevent
  dependency-version: 25.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]