update to store method name

Author: eavanvalkenburg

python/semantic_kernel/data/vector.py

@@ -1571,7 +1571,7 @@ async def list_collection_names(self, **kwargs) -> Sequence[str]:
         """Get the names of all collections."""
         ...  # pragma: no cover
 
-    async def does_collection_exist(self, collection_name: str) -> bool:
+    async def collection_exists(self, collection_name: str) -> bool:
         """Check if a collection exists.
 
         This is a wrapper around the get_collection method of a collection,