Copy edits for name of venue, adds definition of CFP (#703)

Author: JasonWeill

index.html

@@ -257,8 +257,8 @@
                         <div class="con-date dropshadow">May 10–12, 2023</div>
                         <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>
+                            <p class="dropshadow">Cité des sciences, Paris</p>
+                            <p class="dropshadow"><abbr title="Call for proposals">CFP</abbr> opens October 31</p>
                         </div>
                     </div>
                 </div>