Update versions to latest

This project had got quite behind on its dependencies. In the time
since the last update, the GOV.UK tech docs ecosystem now supports
relative links properly, so we no longer require gem patches. The
Github Pages ecosystem has also matured so the workflow for deploying
is now simpler and better supported.

Author: simonwo

.github/workflows/update-from-wiki.yml

@@ -37,29 +37,36 @@ jobs:
           submodules: true
           token: ${{ secrets.GITHUB_TOKEN }}
 
+      - uses: actions/configure-pages@v5
+
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.6
-
-      - name: Restore gems from cache
-        uses: actions/cache@v2
-        env:
-          cache-name: ruby-gems-cache
-        with:
-          path: ./.gems
-          key: ${{ runner.os }}-${{ env.cache-name }}-${{ hashFiles('**/Gemfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-${{ env.cache-name }}-
-
-      - name: Install gems
-        run: bundle install --path=./.gems --jobs=9
+          ruby-version: '3.4'
+          bundler-cache: true
 
       - name: Build site
         run: bundle exec rake
 
-      - name: Deploy to Github Pages
-        uses: peaceiris/actions-gh-pages@v3
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3.0.1
         with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: build
+          path: ./build
+
+  deploy:
+    needs: build-static-pages
+    if: ${{ github.ref == 'refs/heads/main' }}
+
+    permissions:
+      pages: write      # to deploy to Pages
+      id-token: write   # to verify the deployment originates from an appropriate source
+
+    environment:
+      name: Github Pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

Gemfile

@@ -3,7 +3,7 @@
 source 'https://rubygems.org'
 
 # For faster file watcher updates on Windows:
-gem 'wdm', '~> 0.1.0', platforms: [:mswin, :mingw]
+gem 'wdm', platforms: [:mswin, :mingw]
 
 # Windows does not come with time zone data
 gem 'tzinfo-data', platforms: [:mswin, :mingw, :jruby]