Refactor method name (#760)

### What problem does this PR solve?

#757

### Type of change

- [x] Refactoring

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

api/apps/kb_app.py

@@ -109,7 +109,7 @@ def detail():
 
 @manager.route('/list', methods=['GET'])
 @login_required
-def list():
+def list_kbs():
     page_number = request.args.get("page", 1)
     items_per_page = request.args.get("page_size", 150)
     orderby = request.args.get("orderby", "create_time")