Add rubric link

Author: saisha-r

_layouts/default.html

@@ -41,7 +41,7 @@ <h2 class="project-tagline">Neural Data Science @ Dalhousie University</h2>
         <a = href="https://neural-data-science.github.io/NESC_3505/schedule">Schedule</a> |
         <a = href="https://neural-data-science.github.io/NESC_3505_textbook">Textbook</a> |
         <a = href="https://youtube.com/playlist?list=PLtfEWMIgWS22MMZjPIzBRE2cHhMcvEKwp">Videos</a>
-        <a = href="">Rubrics</a> |
+        <a = href="https://neural-data-science.github.io/NESC_3505/rubrics">Rubrics</a> |
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       <footer class="site-footer">