Update release.yml to include write permission (#28)

per softprops/action-gh-release#236

Author: luo-anthony

.github/workflows/release.yml

@@ -13,6 +13,8 @@ jobs:
   release:
     name: Create Release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - uses: actions/checkout@v2
         with: