Update GitHub Actions workflow to use Ruby 3.4 and checkout action v6

Author: mehyaa

.github/workflows/docs.yml

@@ -39,17 +39,18 @@ jobs:
         working-directory: ./docs
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - name: Checkout Source
+        uses: actions/checkout@v6
 
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.1"
+          ruby-version: "3.4"
           bundler-cache: true
-          working-directory: ./docs
+          cache-version: 1
 
       - name: Setup Pages
+        id: pages
         uses: actions/configure-pages@v5
 
       - name: Build with Jekyll