Bump actions/github-script from v3 to v4.0.2

Bumps [actions/github-script](https://github.com/actions/github-script) from v3 to v4.0.2.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@v3...a3e7071)

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

.github/workflows/dependabot.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     name: "Auto merge"
     steps:
-      - uses: actions/github-script@v3
+      - uses: actions/github-script@v4.0.2
         with:
           github-token: ${{secrets.PERSONAL_REPO_TOKEN}}
           script: |