(maint) Revert Ruby bump

This commit reverts the Ruby bump from e9d5634, as it is causing
unexpected dependency failures in projects. This should be resolved once
puppetlabs/vmfloaty#254 is merged and a new
release of the vmfloaty gem is cut.

Author: mhashizume

.github/workflows/static_code_analysis.yaml

@@ -8,7 +8,7 @@ jobs:
     name: Run checks
 
     env:
-      ruby_version: '3.3'
+      ruby_version: '3.1'
       extra_checks: check:symlinks check:git_ignore check:dot_underscore check:test_file
       PUPPET_FORGE_TOKEN: 'YES'