ruby 2.7, 3.0 is EOL-ed. Remove those and add ruby 3.2 and 3.3

.github/workflows/main.yml

@@ -19,7 +19,7 @@ jobs:
         # Indexes for parallel jobs (starting from zero).
         # E.g. use [0, 1] for 2 parallel jobs, [0, 1, 2] for 3 parallel jobs, etc.
         #ci_node_index: [0, 1, 2, 3, 4, 5, 6, 7]
-        ruby-version: ['2.7', '3.0', '3.1']
+        ruby-version: ['3.1', '3.2', '3.3']
 
     env:
       TZ: "Europe/Ireland"
@@ -31,7 +31,7 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           # Not needed with a .ruby-version file
-          ruby-version: 2.7
+          ruby-version: 3.1
           # runs 'bundle install' and caches installed gems automatically
           bundler-cache: true