If we're not supporting 2.7, why am I still testing against it?

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.7', '3.0', '3.1', '3.2']
+        ruby: ['3.0', '3.1', '3.2']
     steps:
       # Use a cache for our tools to speed up testing
       - uses: actions/cache@v3