Bump mikepenz/action-junit-report from 4.1.0 to 4.2.1 (#9938)

Bumps mikepenz/action-junit-report from 4.1.0 to 4.2.1.

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

Author: dependabot[bot]

.github/workflows/full-check.yml

@@ -57,7 +57,7 @@ jobs:
             -Dtest.emma.htmlunit.disable=true
 
       - name: Report test results
-        uses: mikepenz/action-junit-report@v4.1.0
+        uses: mikepenz/action-junit-report@v4.2.1
         if: always()
         with:
           report_paths: 'gwt/build/out/**/test/**/reports/TEST-*.xml'