Add permissions for landing page workflow

Author: ben-edna

.github/workflows/docs.yml

@@ -34,6 +34,8 @@ jobs:
   landing-page:
     name: Landing page
     runs-on: ubuntu-latest
+    permissions:
+        contents: write # For publishing landing page
     steps:
       - name: Harden the runner (Audit all outbound calls)
         uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0