Add Ruby 3.2 to CI matrix

Ruby 3.2 was released today, and I would truly hate for us to waste
another second in adding it to our list of supported versions.

Happy Christmas everyone!

Signed-off-by: Chris Sinjakli <chris@sinjakli.co.uk>

Author: Sinjo

.circleci/config.yml

@@ -28,6 +28,7 @@ workflows:
             - cimg/ruby:2.7
             - cimg/ruby:3.0
             - cimg/ruby:3.1
+            - cimg/ruby:3.2
             - circleci/jruby:9.1
             - circleci/jruby:9.2
             - circleci/jruby:9.3