fix: add write permissions for release workflow

GitHub Actions requires explicit contents:write permission to create releases

Author: wakaka6

.github/workflows/release.yml

@@ -10,6 +10,9 @@ env:
   CARGO_TERM_COLOR: always
   BINARY_NAME: cc-relay-server
 
+permissions:
+  contents: write
+
 jobs:
   create-release:
     runs-on: ubuntu-latest