Update _sidebar.md

Author: kyb3r

docs/_sidebar.md

@@ -1,16 +1,19 @@
 * API Reference
-* [Client](client.md)
-* [Profile](profile.md)
-* [Clan](clan.md)
-* [Constants](constants.md)
+  * [Client](client.md)
+  * [Profile](profile.md)
+  * [Clan](clan.md)
+  
 * Models
-* [Clan Chest](clanchest.md)
-* [Member](member.md)
-* [Arena](arena.md)
-* [Shop](shop.md)
-* [Cycle](cycle.md)
-* [Card Info](cardinfo.md)
-* [Card](card.md)
-* [Alliance](alliance.md)
-* [Country](country.md)
-* [Rarity](rarity.md)
+  * [Clan Chest](clanchest.md)
+  * [Member](member.md)
+  * [Arena](arena.md)
+  * [Shop](shop.md)
+  * [Cycle](cycle.md)
+  * [Card](card.md)
+  
+* Constants
+  * [Constants](constants.md)
+  * [Card Info](cardinfo.md)
+  * [Alliance](alliance.md)
+  * [Country](country.md)
+  * [Rarity](rarity.md)