ci: include test folder in license check (#1203)

Signed-off-by: Jason Liu <jasonliu747@gmail.com>

.github/workflows/license.yml

@@ -5,8 +5,8 @@ on:
     branches:
       - main
       - release-*
-  pull_request: { }
-  workflow_dispatch: { }
+  pull_request: {}
+  workflow_dispatch: {}
 
 jobs:
   license-check:
@@ -26,5 +26,5 @@ jobs:
           go-version-file: go.mod
       - name: Check license header
         run: |
-          make lint-license && git add apis pkg cmd || exit 1
+          make lint-license && git add apis pkg cmd test || exit 1
           git diff --cached --exit-code || (echo 'Please run "make lint-license" to verify license header' && exit 1);