build(deps): bump the ci group with 4 updates

Bumps the ci group with 4 updates: [korthout/backport-action](https://github.com/korthout/backport-action), [actions/setup-go](https://github.com/actions/setup-go), [google-github-actions/setup-gcloud](https://github.com/google-github-actions/setup-gcloud) and [anchore/sbom-action](https://github.com/anchore/sbom-action).


Updates `korthout/backport-action` from 2.1.1 to 2.2.0
- [Release notes](https://github.com/korthout/backport-action/releases)
- [Commits](08bafb375e...b982d297e3)

Updates `actions/setup-go` from 4.1.0 to 5.0.0
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](93397bea11...0c52d547c9)

Updates `google-github-actions/setup-gcloud` from 1.1.1 to 2.0.0
- [Release notes](https://github.com/google-github-actions/setup-gcloud/releases)
- [Changelog](https://github.com/google-github-actions/setup-gcloud/blob/main/CHANGELOG.md)
- [Commits](e30db14379...825196879a)

Updates `anchore/sbom-action` from 0.15.0 to 0.15.1
- [Release notes](https://github.com/anchore/sbom-action/releases)
- [Commits](fd74a6fb98...5ecf649a41)

---
updated-dependencies:
- dependency-name: korthout/backport-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci
- dependency-name: actions/setup-go
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci
- dependency-name: google-github-actions/setup-gcloud
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci
- dependency-name: anchore/sbom-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: ci
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/update.yaml

@@ -20,7 +20,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: Setup Go
-        uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
+        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
           go-version: 1.20.x
           cache-dependency-path: |