Update 3pc.json (#442)

# Pull Request

## What problem does this PR solve?

Issue Number: Fixed #441 

## Possible side effects?

- Performance:

- Backward compatibility:

examples/python/ml/flax_llama7b/3pc.json

@@ -18,8 +18,8 @@
                 ],
                 "spu_internal_addrs": [
                     "127.0.0.1:61930",
-                    "127.0.0.1:61930",
-                    "127.0.0.1:61930"
+                    "127.0.0.1:61931",
+                    "127.0.0.1:61932"
                 ],
                 "runtime_config": {
                     "protocol": "ABY3",
@@ -44,4 +44,4 @@
             }
         }
     }
-}
+}