Add comment to explain why we need this file

Author: serhii73

dateparser/custom_language_detection/fasttext_wrapper.py

@@ -27,6 +27,7 @@ def check(entry):
             else:
                 probs, labels = ([], ())
 
+            # Using np.asarray(probs) to avoid errors in the test
             return labels, np.asarray(probs)