fix: correct state parameter type annotation in create_source to match ConcurrentDeclarativeSource signature

Co-Authored-By: AJ Steers <aj@airbyte.io>

Author: devin-ai-integration[bot]

airbyte_cdk/connector_builder/connector_builder_handler.py

@@ -64,7 +64,7 @@ def create_source(
     config: Mapping[str, Any],
     limits: TestLimits | None = None,
     catalog: ConfiguredAirbyteCatalog | None = None,
-    state: AirbyteStateMessage | None = None,
+    state: List[AirbyteStateMessage] | None = None,
 ) -> ConcurrentDeclarativeSource:
     manifest = config["__injected_declarative_manifest"]