fix comment

README.md

@@ -23,7 +23,7 @@ model = LongformerModel.from_pretrained(
     "allenai/longformer-large-4096", gradient_checkpointing=False
 )
 
-Load the pre-trained checkpoint
+# Load the pre-trained checkpoint.
 url = f"https://scifact.s3.us-west-2.amazonaws.com/longchecker/latest/checkpoints/#longformer_large_science.ckpt"
 out_file = f"checkpoints/longformer_large_science.ckpt"
 cmd = ["wget", "-O", out_file, url]