chore: add X402_PAYMENT_REQUIRED to the ERROR_TYPE enum (#711)

This PR updates the auto-generated Pydantic models based on OpenAPI
specification changes in [apify-docs PR
#2412](apify/apify-docs#2412).

Author: apify-service-account

src/apify_client/_models.py

@@ -115,6 +115,7 @@ class ErrorType(StrEnum):
     UNKNOWN_BUILD_TAG = 'unknown-build-tag'
     UNSUPPORTED_CONTENT_ENCODING = 'unsupported-content-encoding'
     USER_NOT_FOUND = 'user-not-found'
+    X402_PAYMENT_REQUIRED = 'x402-payment-required'
 
 
 @docs_group('Models')