workflows/tests: make consistent with Homebrew/brew.

Make more of the logic consistent with what Homebrew/brew's GitHub
Actions' configuration does.

.github/workflows/tests.yml

@@ -1,8 +1,6 @@
-name: 'Build bottles.'
-
+name: GitHub Actions CI
 on:
   pull_request: []
-
 jobs:
   tests:
     strategy:
@@ -19,11 +17,11 @@ jobs:
       HOMEBREW_NO_ANALYTICS: 1
       HOMEBREW_NO_AUTO_UPDATE: 1
       GITHUB_ACTIONS_HOMEBREW_SELF_HOSTED: 1
-      GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}} 
+      GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
     steps:
       - name: Update Homebrew
         run: brew update-reset
-      - name: Checkout repository
+      - name: Set up Git repository
         run: |
           cd $(brew --repo ${{github.repository}})
           git clean -ffdx
@@ -31,7 +29,7 @@ jobs:
           git fetch --prune --force origin ${{github.sha}}
           git checkout --force ${{github.sha}}
           git log -1
-      - name: Build bottles
+      - name: Run brew test-bot
         run: |
           mkdir bottles
           cd bottles