update README endpoint

rename from `/go/forward` to `/go/pher`. This aligns documentation with the new API path for forwarding HTTP requests using a custom TLS fingerprint.

Author: RealSadmc

README.md

@@ -18,7 +18,7 @@ An API that forwards your HTTP requests using a custom TLS fingerprint.
 
 ## 📚 Documentation
 
-### Endpoint: `/go/forward`
+### Endpoint: `/go/pher`
 
 ### Method: `POST`