Update index.html

I think this should work.

Author: jschuemann

index.html

@@ -36,7 +36,8 @@ <h3>Welcome to the TOPAS Collaboration official site!</h3>
 
         <p class="notice"> 
           <b>Virtual User Meeting!</b>
-          We will be holding a virtual user meetin on Oct. 21, 11am EST. For more, see: <a href="https://github.com/OpenTOPAS/OpenTOPAS/discussions/167" > </a> 
+          We will be holding a virtual user meetin on Oct. 21, 11am EST. For more, see: 
+            <a href="https://github.com/OpenTOPAS/OpenTOPAS/discussions/167" target="_blank"> Discussions #167 </a> 
         </p>