chore(deps): Bump @backstage/plugin-catalog-graph from 0.4.9 to 0.4.15

Bumps [@backstage/plugin-catalog-graph](https://github.com/backstage/backstage/tree/HEAD/plugins/catalog-graph) from 0.4.9 to 0.4.15.
- [Release notes](https://github.com/backstage/backstage/releases)
- [Changelog](https://github.com/backstage/backstage/blob/master/plugins/catalog-graph/CHANGELOG.md)
- [Commits](https://github.com/backstage/backstage/commits/HEAD/plugins/catalog-graph)

---
updated-dependencies:
- dependency-name: "@backstage/plugin-catalog-graph"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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