Bump uhafner/autograding-github-action from 1.7.3 to 2.0.0

Bumps [uhafner/autograding-github-action](https://github.com/uhafner/autograding-github-action) from 1.7.3 to 2.0.0.
- [Release notes](https://github.com/uhafner/autograding-github-action/releases)
- [Commits](uhafner/autograding-github-action@v1.7.3...v2.0.0)

---
updated-dependencies:
- dependency-name: uhafner/autograding-github-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/autograding.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Mutation Coverage
         run: mvn -V --color always -ntp org.pitest:pitest-maven:mutationCoverage
       - name: Autograding
-        uses: uhafner/autograding-github-action@v1.7.3
+        uses: uhafner/autograding-github-action@v2.0.0
         with:
           TOKEN: ${{ secrets.GITHUB_TOKEN }}
           HEAD_SHA: ${{github.event.pull_request.head.sha}}