GitHub Action: use v4 of junit report

Author: rjbs

.github/workflows/multiperl-test.yml

@@ -83,7 +83,7 @@ jobs:
         run: |
           JUNIT_TEST_FILE="/tmp/test-output.xml" ALLOW_PASSING_TODOS=1 yath test --renderer=Formatter --renderer=JUnit -D
       - name: Publish test report
-        uses: mikepenz/action-junit-report@v3
+        uses: mikepenz/action-junit-report@v4
         if: always() # always run even if the previous step fails
         with:
           check_name: JUnit Report (${{ matrix.perl-version }})