correcting syntax error in app.py

app.py

@@ -105,7 +105,7 @@ print(f"Vector database location:\n{persisted_vectordb_location}\n")
 # vector database constructor Chroma()
 vectorstore_persisted = Chroma(
     collection_name = tesla_10k_collection,
-    persist_directory = persisted_vectordb_location     # './tesla_db',
+    persist_directory = persisted_vectordb_location,     # './tesla_db',
     embedding_function = embedding_model
 )