Bump github/combine-prs from 4.1.0 to 5.0.0

Bumps [github/combine-prs](https://github.com/github/combine-prs) from 4.1.0 to 5.0.0.
- [Release notes](https://github.com/github/combine-prs/releases)
- [Commits](github/combine-prs@v4.1.0...v5.0.0)

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

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

.github/workflows/combine-prs.yml

@@ -17,4 +17,4 @@ jobs:
     steps:
       - name: combine-prs
         id: combine-prs
-        uses: github/combine-prs@v4.1.0
+        uses: github/combine-prs@v5.0.0