open notebook links in new tab

Author: aagrande

docs/index.html

@@ -760,9 +760,9 @@ <h4>
             <b> A simple response with two sinusoidal components
               <!-- Your clickable links -->
               <a href="https://colab.research.google.com/github/blei-lab/treeffuser/blob/tutorials/examples/README_example.ipynb"
-                style="color: #145c15; font-weight: bold;">[colab]</a>
+                target="_blank" style="color: #145c15; font-weight: bold;">[colab]</a>
               <a href="https://github.com/blei-lab/treeffuser/blob/tutorials/examples/README_example.ipynb"
-                style="color: #145c15; font-weight: bold;">[source]</a>
+                target="_blank" style="color: #145c15; font-weight: bold;">[source]</a>
             </b>
           </h4>
           <p>