CI: Name test jobs mentioning Redis (#256)

CI: Name test jobs mentioning Redis (#256)

E.g.: Ruby 2.7 (redis 5.x)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 639011c..c1be86d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ env:
 jobs:
   build:
     runs-on: ubuntu-latest
-    name: Ruby ${{ matrix.ruby }}
+    name: Ruby ${{ matrix.ruby }} (redis ${{ matrix.redis }})
     services:
       postgres:
         image: postgres:14.0

GitHub sha: d63f808d71732af78e30a65dcee33e198b8fedc9

This commit appears in #256 which was approved by CvX. It was merged by CvX.