Fix workflow permissions

.github/workflows/build-site.yml

@@ -1,10 +1,18 @@
 name: CI - Build Site
 on:
   push:
-    branches-ignore:
-      - gh-pages
   workflow_dispatch:
   pull_request:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
 jobs:
   build:
     name: Build Site and Deploy