Bump actions-runner-controller from dcb64f0 to b511953

Bumps [actions-runner-controller](https://github.com/actions/actions-runner-controller) from `dcb64f0` to `b511953`.
- [Release notes](https://github.com/actions/actions-runner-controller/releases)
- [Commits](actions/actions-runner-controller@dcb64f0...b511953)

---
updated-dependencies:
- dependency-name: actions-runner-controller
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>