chore: add contents: write permission to rustdoc workflow (#152)

Author: sd2k

.github/workflows/rustdoc.yml

@@ -17,6 +17,9 @@ jobs:
   rustdoc:
     runs-on: ubuntu-latest
 
+    permissions:
+      contents: write
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0