gempush.yml in gepub-1.0.16

- old
+ new

@@ -9,13 +9,13 @@
     name: Build + Publish
     runs-on: ubuntu-latest
 
     steps:
     - uses: actions/checkout@master
-    - name: Set up Ruby 2.6
+    - name: Set up Ruby
       uses: actions/setup-ruby@v1
       with:
-        ruby-version: 2.6.x
+        ruby-version: 3.1.x
 
     - name: Publish to GPR
       run: |
         mkdir -p $HOME/.gem
         touch $HOME/.gem/credentials