Update README.md

README.md

@@ -21,7 +21,7 @@ This dataset was created from the HuggingFace dataset **AIatMongoDB/embedded_mov
 **Why was it needed?**
 
 1. The original dataset is close to 25 GB, for learning and experiments it is an overkill
-2. Data in the dataset needs to be cleaned up e.g., some features are No that requires extra care
+2. Data in the dataset needs to be cleaned up e.g., some features are Null that requires extra care
 3. Some of the embeddings are missing
 
 **How to use?**