Add write permission to create release

Author: arushi297

.github/workflows/unittest.yml

@@ -100,6 +100,8 @@ jobs:
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
     name: Create Release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - name: Create release file
         run: |