squash: force latest again

Author: arielvalentin

.github/actions/test_gem/action.yml

@@ -84,6 +84,7 @@ runs:
     - name: Install Ruby ${{ inputs.ruby }} without dependencies
       uses: ruby/[email protected]
       with:
+        bundler: "latest"
         ruby-version: "${{ inputs.ruby }}"
         working-directory: "${{ steps.setup.outputs.gem_dir }}"