Bump github.com/fluxcd/pkg/apis/event from 0.12.0 to 0.13.0 (#187)

Bumps [github.com/fluxcd/pkg/apis/event](https://github.com/fluxcd/pkg) from 0.12.0 to 0.13.0.
- [Commits](fluxcd/pkg@git/v0.12.0...git/v0.13.0)

---
updated-dependencies:
- dependency-name: github.com/fluxcd/pkg/apis/event
  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]