Fix version string in setup-ruby CI

Author: AaronAtDuo

.github/workflows/gem-push.yml

@@ -13,7 +13,7 @@ jobs:
     - name: Set up Ruby 3.2
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.2.x
+        ruby-version: 3.2
 
     - name: Publish to RubyGems
       run: |