Update ci.yaml

.github/workflows/ci.yaml

@@ -2,13 +2,13 @@ on: push
 jobs:
   build:
     runs-on: ubuntu-latest
-    name: Ruby ${{ matrix.ruby }} sample
+    name: script/cibuild
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-ruby@v1
         with:
           ruby-version: 2.7
-      - name: CI Build
+      - name: build & test
         run: |
           script/bootstrap
           script/cibuild