Bump github/combine-prs from 5.0.0 to 5.1.0 (#2039)

Bumps [github/combine-prs](https://github.com/github/combine-prs) from 5.0.0 to 5.1.0.
- [Release notes](https://github.com/github/combine-prs/releases)
- [Commits](github/combine-prs@v5.0.0...v5.1.0)

---
updated-dependencies:
- dependency-name: github/combine-prs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/combine-dependabot-prs.yml

@@ -18,6 +18,6 @@ jobs:
     steps:
       - name: combine-prs
         id: combine-prs
-        uses: github/combine-prs@v5.0.0 # where X.X.X is the latest version
+        uses: github/combine-prs@v5.1.0 # where X.X.X is the latest version
         with:
           labels: dependencies,automated