hw fix

Author: SuryaKrishnapillai

index.md

@@ -38,9 +38,8 @@ Your instructor this semester is Surya Krishnapillai!
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             <span class="label label-yellow"><strong>Homework 1</strong> (due Feb 23)</span>
             <a href="/nmep/assets/hw1/hw1-math.pdf">Math</a>
-            <a href="/nmep/assets/hw1/hw1-numpy.ipynb">NumPy</a>
-            <a href="/nmep/assets/hw1/hw1-pandas.ipynb">Pandas</a>
-            <a href="/nmep/assets/hw1/hw1-intro-pytorch.ipynb">PyTorch</a>
+            <a href="https://colab.research.google.com/github/mlberkeley/nmep/blob/main/assets/hw1/hw1-numpy.ipynb">NumPy</a>
+            <a href="https://colab.research.google.com/github/mlberkeley/nmep/blob/main/assets/hw1/hw1-pandas.ipynb">Pandas</a>
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