fix(missing nav): add missing link to navigate to bounties section (#2)

Author: kumulydev

_data/navigation.yml

@@ -4,6 +4,8 @@
   url: /#
 - text: Merch
   url: /#
+- text: Bounties
+  url: /bounties
 - text: About Kumuly
   url: /# #/about
 - text: Reach out