Update workflow file

Author: khiga8

.github/workflows/ci.yml

@@ -1,8 +1,8 @@
-name: Run unit tests
-on: push
-
+name: CI
+on: [push, pull_request, workflow_dispatch]
 jobs:
-  accessibility_alt_text_bot:
+  tests:
+    name: Run unit tests
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
@@ -12,4 +12,3 @@ jobs:
         run: |
           ls
           ./test-flag-alt-text.sh
-