docs(ci): Fix permission issues raised by the docs ci workflow (#234)

Author: xmnlab

.github/workflows/docs.yaml

@@ -10,6 +10,9 @@ on:
 env:
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+permissions:
+  contents: write
+
 jobs:
   gen-docs:
     runs-on: ubuntu-latest