update hw1 readme

hw1/README.md

@@ -8,7 +8,7 @@ You will need to download `speech.tar.gz` file from the Kaggle website, and put
 
  This will train a default logistic regression classifier, and save the output predictions in `data/speech-basic.csv`. If you like, you can upload this file to Kaggle, and make sure you are getting the same/similar performance as the benchmarks on Kaggle.
 
-The current assignment description is available [here](http://sameersingh.org/courses/statnlp/wi18/assignments.html#hw1).
+The current assignment description is available [here](https://canvas.eee.uci.edu/courses/14385/assignments/270635), previous years: [2018](http://sameersingh.org/courses/statnlp/wi17/assignments.html#hw1), [2017](http://sameersingh.org/courses/statnlp/wi17/assignments.html#hw1).
 
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