Add needed GH Pages permissions to CI

Just stealing from hugo lol

Author: nicholastay

.github/workflows/pages.yaml

@@ -1,10 +1,16 @@
 name: build-and-deploy
+
 on:
   push:
     branches:
       - master
   workflow_dispatch:
 
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
 jobs:
   build:
     runs-on: ubuntu-latest