Bump actions/github-script from 6.1.0 to 6.1.1 (sigstore#2156)

Bumps [actions/github-script](https://github.com/actions/github-script) from 6.1.0 to 6.1.1.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@7a5c598...d50f485)

---
updated-dependencies:
- dependency-name: actions/github-script
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

.github/workflows/milestone.yaml

@@ -23,7 +23,7 @@ jobs:
       statuses: none
 
     steps:
-      - uses: actions/github-script@7a5c598405937d486b0331594b5da2b14db670da # v6.1.0
+      - uses: actions/github-script@d50f485531ba88479582bc2da03ff424389af5c1 # v6.1.0
         with:
           script: |
             if (!context.payload.pull_request.merged) {