chore: remove extra url

Author: DanielRivers

src/content/docs/authenticate/authentication-methods/username-authentication.mdx

@@ -94,7 +94,7 @@ Once an email is verified, we add this email identity for the user. If the auth
 - Can include letters, numbers, -dashes, \_underscores (no special characters)
 - Case is ignored. Jane and jane are treated the same.
 
-You can bring your own validation rule using Workflows ([example](https://github.com/kinde-starter-kits/workflow-examples/blob/main/usernameValidation/customUsernameValidation.ts)) - usernameValidation/customUsernameValidation.ts
+You can bring your own validation rule using Workflows ([example](https://github.com/kinde-starter-kits/workflow-examples/blob/main/usernameValidation/customUsernameValidation.ts))
 
 ## One password for multiple identities