Update ci.yml

Rename this workflow to CI so the Dependabot merger will recognise it.

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: Run Tests
+name: CI
 on: [push, pull_request]
 jobs:
 
@@ -21,7 +21,8 @@ jobs:
      security-events: write
      actions: read
 
-  test:
+  test-ruby:
+    name: Test Ruby
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4