fix: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

.github/workflows/mockery.yml

@@ -6,6 +6,8 @@ on:
 jobs:
   mockery:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - name: Checkout code
         uses: actions/checkout@v4