Update aspnetcore/security/authentication/configure-jwt-bearer-authentication.md

Co-authored-by: Rick Anderson <[email protected]>

Author: damienbod

aspnetcore/security/authentication/configure-jwt-bearer-authentication.md

@@ -333,7 +333,7 @@ It is important not to create security problems in the API so that you can test
 
 Swagger and Postman are great UI tools for testing APIs. For the tools to work, the API can produce an Open API document and this can be loaded into the client testing tool. A security flow to acquire a new access token can be added to the API Open API file. 
 
-> Note 
+> Warning
 > Do not deploy insecure security test flows to production.
 
 If implementing a Swagger UI for an API, you should normally not deploy the UI to production as the security must be weakened to allow this to work.