Fixed link in README's Standard Integration section (#24)

Author: sunnywu

README.md

@@ -61,7 +61,7 @@ print(decrypted_token.uid2)
 
 ### Standard Integration
 
-If you're using standard integration (client and server) (see [UID2 SDK for JavaScript Integration Guide](https://unifiedid.com/docs/guides/publisher-client-side)), follow this step:
+If you're using standard integration (client and server) (see [UID2 SDK for JavaScript Integration Guide](https://unifiedid.com/docs/guides/integration-javascript-server-side)), follow this step:
 
 * Send this identity as a JSON string back to the client (to use in the [identity field](https://unifiedid.com/docs/sdks/client-side-identity#initopts-object-void)) using the following: