chore: Update SnowflakeSink type annotations

Author: edgarrmondragon

Diff for: target_snowflake/sinks.py

@@ -21,7 +21,7 @@
 from target_snowflake.connector import SnowflakeConnector
 
 if t.TYPE_CHECKING:
-    from singer_sdk import PluginBase, SQLConnector
+    from singer_sdk import PluginBase
 
 DEFAULT_BATCH_CONFIG = {
     "encoding": {"format": "jsonl", "compression": "gzip"},
@@ -40,7 +40,7 @@ def __init__(
         stream_name: str,
         schema: dict,
         key_properties: list[str] | None,
-        connector: SQLConnector | None = None,
+        connector: SnowflakeConnector | None = None,
     ) -> None:
         """Initialize Snowflake Sink."""
         self.target = target