Refactor save_vote function to write each vote entry with a newline character

main.py

@@ -71,8 +71,9 @@ def save_vote(vote_entry):
     with open(VOTES_FILE, "a") as file:
         date_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
         vote_entry["timestamp"] = date_time
-        json.dump(vote_entry, file)
-        file.write("\n")
+        file.write(
+            json.dumps(vote_entry) + "\n"
+        )  # Add a newline character after writing each entry
     logger.info(f"Vote saved: {vote_entry}")