Update index.html

Co-authored-by: Chris Holdgraf <[email protected]>

Author: Carreau

index.html

@@ -255,7 +255,7 @@
                 <div class="con-container img-responsive">
                     <div class="col-lg-8 con-content md-offset-2">
                         <div class="con-date dropshadow">May 10–12, 2023</div>
-                        <img class="con-title dropshadow img-responsive" src="assets/jupytercon-logo.png" />
+                        <img class="con-title dropshadow img-responsive" src="assets/jupytercon-logo.png" alt="The JupyterCon Logo" />
                         <div class="con-program">
                             <p class="dropshadow">Cité des Science, Paris, France</p>
                             <p class="dropshadow">CFP open Oct 31st</p>