Update .github/workflows/ci.yml

Source file https://github.com/dry-rb/template-gem/blob/5808edd8c6623f57e9d679843e31eaf59d8d7992/.github/workflows/ci.yml.erb

Author: File Sync

.github/workflows/ci.yml

@@ -30,7 +30,6 @@ jobs:
         - "3.2"
         - "3.1"
         - "3.0"
-        - "2.7"
         include:
           - ruby: "3.2"
             coverage: "true"