ci/docs: run non-build jobs on ARM

This may be marginally slower, but should be more efficient.

Continue using x86 for the main build as it will be faster.

Author: MattSturgeon

.github/workflows/website.yml

@@ -79,7 +79,7 @@ jobs:
 
   combine:
     name: Combine builds
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04-arm
     needs: build
 
     env:
@@ -111,7 +111,7 @@ jobs:
 
   deploy:
     name: Deploy
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04-arm
     needs: combine
 
     permissions: