Add Ruby 3.3 to the build matrix

Author: ur5us

.github/workflows/main.yml

@@ -12,13 +12,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby_version: ['3.0', '3.1', '3.2']
+        ruby_version: ['3.0', '3.1', '3.2', '3.3']
         rails_version: ['6.1', '7.0', '7.1']
         exclude:
           - ruby_version: 3.1
             rails_version: 6.1
           - ruby_version: 3.2
             rails_version: 6.1
+          - ruby_version: 3.3
+            rails_version: 6.1
     services:
       db:
         image: postgres:16