.github: Fix CI

Author: simnalamburt

.github/workflows/gh-pages.yml

@@ -1,31 +1,43 @@
-name: github pages
+name: Deploy mdBook site to Pages
 
 on:
-    push:
-        branches:
-            - master
-    pull_request:
-    workflow_dispatch:
+  push:
+    branches: [main]
+  workflow_dispatch: # Allows you to run this workflow manually from the Actions tab
 
-jobs:
-    deploy:
-        runs-on: ubuntu-20.04
-        concurrency:
-            group: ${{ github.workflow }}-${{ github.ref }}
-        steps:
-            - uses: actions/checkout@v2
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
 
-            - name: Setup mdBook
-              uses: peaceiris/actions-mdbook@v1
-              with:
-                  mdbook-version: "0.4.37"
-                  # mdbook-version: 'latest'
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: pages
+  cancel-in-progress: false
 
-            - run: mdbook build
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: peaceiris/actions-mdbook@v2
+        with:
+          mdbook-version: latest
+      - id: pages
+        uses: actions/configure-pages@v5
+      - run: mdbook build
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./book
 
-            - name: Deploy
-              uses: peaceiris/actions-gh-pages@v3
-              if: ${{ github.ref == 'refs/heads/master' }}
-              with:
-                  github_token: ${{ secrets.GITHUB_TOKEN }}
-                  publish_dir: ./book
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-24.04
+    needs: build
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v4