Fix typos: gentenv -> getenv (#370)

Author: Paul-Cornell

snippets/destination_connectors/lancedb.v2.py.mdx

@@ -102,6 +102,6 @@ if __name__ == "__main__":
         # ),
 
         stager_config=LanceDBUploadStagerConfig(),
-        uploader_config=LanceDBUploaderConfig(table_name=os.gentenv("LANCEDB_TABLE"))
+        uploader_config=LanceDBUploaderConfig(table_name=os.getenv("LANCEDB_TABLE"))
     ).run()
 ```

snippets/destination_connectors/qdrant.v2.py.mdx

@@ -65,7 +65,7 @@ if __name__ == "__main__":
         # ),
         # stager_config=LocalQdrantUploadStagerConfig(),
         # uploader_config=LocalQdrantUploaderConfig(
-        #     collection_name=os.gentenv("QDRANT_COLLECTION"),
+        #     collection_name=os.getenv("QDRANT_COLLECTION"),
         #     batch_size=50,
         #     num_processes=1
         # )
@@ -77,7 +77,7 @@ if __name__ == "__main__":
         # ),
         # stager_config=ServerQdrantUploadStagerConfig(),
         # uploader_config=ServerQdrantUploaderConfig(
-        #     collection_name=os.gentenv("QDRANT_COLLECTION"),
+        #     collection_name=os.getenv("QDRANT_COLLECTION"),
         #     batch_size=50,
         #     num_processes=1
         # )
@@ -91,7 +91,7 @@ if __name__ == "__main__":
         ),
         stager_config=CloudQdrantUploadStagerConfig(),
         uploader_config=CloudQdrantUploaderConfig(
-            collection_name=os.gentenv("QDRANT_COLLECTION"),
+            collection_name=os.getenv("QDRANT_COLLECTION"),
             batch_size=50,
             num_processes=1
         )