Update ELVIS link

Link to https://simssa.ca/blog/introducing-elvis-the-computer-driven-music-analysis-research-project/, since both websites (http://elvisproject.ca, http://elvis.music.mcgill.ca)are no longer available.
Alternatively, we may refer to the ELVIS GitHub page: https://github.com/ELVIS-project.

Author: clarelinzx

about/index.html

@@ -89,7 +89,7 @@ <h2 id="why-we-need-a-single-interface-for-music-score-searching-and-analysis-si
           <h2 id="content-and-analysis">Content and Analysis</h2>
           <p><br /></p>
           <p>Our research is organized along two axes: content and analysis. The content axis creates document processing and OMR systems for digital images, transforming them into searchable symbolic notation. Check out the <a href="http://cantus.simssa.ca/">Cantus Ultimus</a> project to see current OMR work in action on chant manuscripts from the <a href="http://cantus.uwaterloo.ca/">CANTUS database at the University of Waterloo</a>.</p>
-          <p>The analysis axis develops tools and techniques for large-scale search and analysis of music in symbolic notation. Take a look at the <a href="http://elvisproject.ca/">ELVIS Project</a> to access our growing database of music in symbolic notation and explore some of our software development on <a href="https://github.com/DDMAL">GitHub</a>.</p>
+          <p>The analysis axis develops tools and techniques for large-scale search and analysis of music in symbolic notation. Take a look at the <a href="https://simssa.ca/blog/introducing-elvis-the-computer-driven-music-analysis-research-project/">ELVIS Project</a> to access our growing database of music in symbolic notation and explore some of our software development on <a href="https://github.com/DDMAL">GitHub</a>.</p>
           <p>Keep up-to-date with our <a href="../blog">blog</a>, follow us on <a href="https://twitter.com/simssaproject">Twitter</a>, and check out our <a href="../activities/publications">publications</a>, <a href="../activities/workshops">workshops</a>, <a href="../activities/presentations">presentations</a>, <a href="../activities/impact">impact</a>, and <a href="../activities/media">media</a>.</p>
           <p><br /></p>
           <h2 id="the-simssa-team">The SIMSSA Team</h2>