update ruby versions matrix in CI (wantedly#7)

Author: adrienpoly

.github/workflows/main.yml

@@ -14,7 +14,9 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - 3.0.2
+          - 3.2
+          - 3.3
+          - 3.4
 
     steps:
     - uses: actions/checkout@v2