Update docs.yml

Author: andreasnoack

.github/workflows/docs.yml

@@ -1,4 +1,7 @@
 name: Documentation
+permissions:
+  actions: write
+  contents: read
 on:
   pull_request:
     branches: [master]
@@ -17,4 +20,4 @@ jobs:
        - uses: julia-actions/cache@v2
        - uses: julia-actions/julia-docdeploy@v1
          env:
-           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}