chore: configure workflow permissions

Signed-off-by: Anthony D. Mays <[email protected]>

Author: anthonydmays

.github/workflows/check_lesson_15_java_pr.yaml

@@ -12,6 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
+      pull-requests: write
 
     steps:
     - uses: actions/checkout@v4