Upgrade Ruby to version 3.3.9

We're also updating the parser gem so we don't get any warnings.

.gitlab-ci.yml

@@ -3,7 +3,7 @@ stages:
   - lint
 
 tests:
-  image: "ruby:3.3.8"
+  image: "ruby:3.3.9"
   stage: test
   services:
     - postgres:14.19
@@ -38,7 +38,7 @@ tests:
 # PRONTO_GITLAB_API_PRIVATE_TOKEN to your repository CI/CD settings
 # giving it the value of the Personal Access Token
 linters:
-  image: "ruby:3.3.8"
+  image: "ruby:3.3.9"
   stage: lint
   cache:
     key: consul