doc: fix broken links

Author: rofr

docs/models/index.html

@@ -5,10 +5,10 @@
 
 <h4>Built-in Models</h4>
 <ol>
-	<li><a href="redis">Redis</a></li>
-	<li><a href="key-value">Key/Value</a></li>
-	<li><a href="graph">Graph</a></li>
-	<li><a href="messaging">Message Broker</a></li>
-	<li><a href="geo">GeoSpatial</a></li>
-	<li><a href="other">Other types</a></li>
+	<li><a href="models/redis">Redis</a></li>
+	<li><a href="models/key-value">Key/Value</a></li>
+	<li><a href="models/graph">Graph</a></li>
+	<li><a href="models/messaging">Message Broker</a></li>
+	<li><a href="models/geo">GeoSpatial</a></li>
+	<li><a href="models/other">Other types</a></li>
 </ol>