[CI] Lock bundler to v 2.4.22, since Ruby old :(

Author: picandocodigo

.github/workflows/7x_tests.yml

@@ -36,7 +36,7 @@ jobs:
     - name: Bundle
       run: |
         sudo apt-get install libsqlite3-dev
-        gem install bundler
+        gem install bundler -v 2.4.22
         bundle install
         bundle exec rake bundle:clean
         bundle exec rake bundle:install