chore: add ruby 3.3 support in gh actions (#163)

Author: rarruda

.github/workflows/pull_request.yml

@@ -31,6 +31,7 @@ jobs:
           - jruby-9.4
           - jruby-9.3
           - jruby-9.2
+          - 3.3
           - 3.2
           - 3.1
           - '3.0'

README.md

@@ -10,6 +10,7 @@ Leverage the [Unleash Server](https://github.com/Unleash/unleash) for powerful f
 
 ## Supported Ruby Interpreters
 
+  * MRI 3.3
   * MRI 3.2
   * MRI 3.1
   * MRI 3.0