ci: Update actions/deploy-pages to v4 and split jobs

Author: capslock

.github/workflows/rustdoc.yml

@@ -30,17 +30,11 @@ concurrency:
   cancel-in-progress: false
 
 jobs:
-  # Single deploy job since we're just deploying
-  deploy:
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
+  build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - name: Setup Pages
-        uses: actions/configure-pages@v3
       - name: Build Documentation
         run: cargo doc --all --no-deps
       - name: Add Redirect
@@ -57,6 +51,13 @@ jobs:
         with:
           # Upload docs output
           path: './target/doc'
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4