Update kop/java/README.md

Co-authored-by: Huanli Meng <[email protected]>

Author: Demogorgon314

kop/java/README.md

@@ -84,7 +84,9 @@ Initialize the Hydra OAuth2 server.
 2. Configure the oauth in Pulsar
 
 This example will use the follow values:
-> Need replace the privateKey value to your local credentials_file.json path.
+> **Note**
+>
+> You need to replace the `privateKey` value with your local path to your `credentials_file.json` file.
 ```properties
 # Enable the authentication
 authenticationEnabled=true