Bump mikepenz/action-junit-report from 3 to 6

Bumps [mikepenz/action-junit-report](https://github.com/mikepenz/action-junit-report) from 3 to 6.
- [Release notes](https://github.com/mikepenz/action-junit-report/releases)
- [Commits](mikepenz/action-junit-report@v3...v6)

---
updated-dependencies:
- dependency-name: mikepenz/action-junit-report
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ubuntu.yml

@@ -88,7 +88,7 @@ jobs:
           name: $${{ matrix.release }}_$${{ matrix.output }}
 
       - name: ${{ matrix.name }} JUnit
-        uses: mikepenz/action-junit-report@v3
+        uses: mikepenz/action-junit-report@v6
         with:
           report_paths: ${{ matrix.release }}-${{ matrix.output }}
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -221,7 +221,7 @@ jobs:
           name: longtests_xml_outputs_$${{ matrix.name }}
 
       - name: ${{ matrix.name }} JUnit
-        uses: mikepenz/action-junit-report@v3
+        uses: mikepenz/action-junit-report@v6
         with:
           report_paths: test_results_${{ matrix.name }}.xml
           github_token: ${{ secrets.GITHUB_TOKEN }}