fix: Only replace title in activity.js

Author: Christopher Liu

src/patch.sh

@@ -3,4 +3,4 @@ sed -i "s,window.isElectron == true,true,g" musicblocks/js/*.js
 sed -i "s,return \"\";,,g" musicblocks/js/SaveInterface.js
 sed -i "s,event.preventDefault();,,g" musicblocks/js/SaveInterface.js
 sed -i 's,event.returnValue = "";,,g' musicblocks/js/SaveInterface.js
-sed -i 's, is a collection of tools for exploring fundamental musical concepts in a fun way.,,g' musicblocks/js/turtledefs.js
+sed -i 's,document.title = TITLESTRING;,document.title = "Music Blocks",g' musicblocks/js/activity.js