Update Bundler installation to use user-specific path in Jekyll deploy workflow

Author: jetzlstorfer

.github/workflows/jekyll-deploy.yml

@@ -38,7 +38,9 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y build-essential
 
       - name: Update Bundler
-        run: gem install bundler
+        run: |
+          gem install bundler --user-install
+          echo "$HOME/.gem/ruby/3.2.0/bin" >> $GITHUB_PATH
 
       - name: Install dependencies
         run: bundle install