fix(forge): cast port to int (#6643)

When executing `port = os.getenv("PORT", 8000)` if the port is being fetched from a `.env` file it is fetched as a string.

This caused an error: `TypeError: 'str' object cannot be interpreted as an integer`

autogpts/forge/forge/__main__.py

@@ -41,5 +41,5 @@ if __name__ == "__main__":
     forge.sdk.forge_log.setup_logger()
 
     uvicorn.run(
-        "forge.app:app", host="localhost", port=port, log_level="error", reload=True
+        "forge.app:app", host="localhost", port=int(port), log_level="error", reload=True
     )