ci(bearer): enhance security with Bearer GitHub Action integration

- Add Bearer GitHub Action to scan for sensitive data in the codebase, configured to only scan changes in the current pull request or commit

Signed-off-by: appleboy <appleboy.tw@gmail.com>

.github/workflows/lint.yml

@@ -28,6 +28,15 @@ jobs:
         with:
           dockerfile: docker/Dockerfile
 
+      # This step uses the Bearer GitHub Action to scan for sensitive data in the codebase.
+      # The 'uses' keyword specifies the action to be used, in this case, 'bearer/bearer-action' at version 'v2'.
+      # The 'with' keyword provides input parameters for the action:
+      # - 'diff: true' indicates that the action should only scan the changes in the current pull request or commit.
+      - name: Bearer
+        uses: bearer/bearer-action@v2
+        with:
+          diff: true
+
   testing:
     runs-on: ubuntu-latest
     container: golang:1.22-alpine