1.2.0: update version to release

site/src/jsMain/resources/index.html

@@ -329,7 +329,7 @@
 <!-- Top-left version ribbon -->
 <div class="corner-ribbon bg-danger text-white">
         <span style="margin-left: -5em">
-            v1.2.0-SNAPSHOT
+            v1.2.0!
         </span>
 </div>
 <!-- Fixed top navbar for the whole site -->