Adjust ruby versions

Author: laurynas

.github/workflows/main.yml

@@ -6,9 +6,9 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-          - 2.0
+          - 2.0.0
           - 2.7
-          - 3.0
+          - 3.0.0
           - 3.4
           - ruby-head
           - jruby-head