ci: fix permissions

.github/workflows/docs.yml

@@ -4,6 +4,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -23,6 +27,10 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     needs: build
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}