Update appcast ruby action

Author: MattKiazyk

.github/workflows/appcast.yml

@@ -22,8 +22,8 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-gems-
           
-    - name: Ruby ♦️
-      uses: actions/setup-ruby@v1.1.3
+    - name: Setup Ruby, JRuby and TruffleRuby
+      uses: ruby/setup-ruby@v1.139.0
       with:
         ruby-version: '2.7'