Reinstall the default bundler version - just to be sure everything works

Author: philippthun

.github/workflows/bump_bundler_version.yml

@@ -22,6 +22,11 @@ jobs:
           echo "Remove all bundler versions except the default one"
           gem uninstall bundler -a -x
 
+          BUNDLER_VERSION=$(ruby -rbundler -e 'puts Bundler::VERSION')
+
+          echo "Reinstall the default bundler version - just to be sure everything works"
+          gem install bundler -v $BUNDLER_VERSION
+
           ruby -v
           bundler -v