Update index.tmpl to fix snapshot spelling

Author: jdaugherty

docs/src/docs/index.tmpl

@@ -71,7 +71,7 @@ img {
 
 		<h2>Current Documentation (Grails 7+)</h2>
 		<ul>
-		   <li><a href="/grails-db-reverse-engineer/snpashot/index.html">User guide</a></li>
+		   <li><a href="/grails-db-reverse-engineer/snapshot/index.html">User guide</a></li>
 		</ul>
 
 		<h2>Documentation (Grails 3)</h2>