Bump and fix AppCast action

Author: MattKiazyk

.github/workflows/appcast.yml

@@ -22,10 +22,10 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-gems-
           
-    - name: Setup Ruby, JRuby and TruffleRuby
-      uses: ruby/setup-ruby@v1.165.1
-      with:
-        ruby-version: '2.7'
+    # - name: Setup Ruby, JRuby and TruffleRuby
+    #   uses: ruby/setup-ruby@v1.165.1
+    #   with:
+    #     ruby-version: '3.0'
 
     - name: Bundler 💎
       working-directory: AppCast
@@ -43,8 +43,8 @@ jobs:
       run: bundle exec jekyll build
 
     - name: Publish 🚀
-      uses: JamesIves/github-pages-deploy-action@releases/v3
+      uses: JamesIves/github-pages-deploy-action@releases/v4
       with:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        BRANCH: gh-pages
-        FOLDER: AppCast/_site
+        token: ${{ secrets.GITHUB_TOKEN }}
+        branch: gh-pages
+        folder: AppCast/_site