move jwt auth doc (#414)

Author: elizabethtrykin

fern/docs.yml

@@ -267,9 +267,6 @@ navigation:
           - page: Server authentication
             path: server-url/server-authentication.mdx
             icon: fa-light fa-key
-          - page: JWT authentication
-            path: customization/jwt-authentication.mdx
-            icon: fa-light fa-shield-keyhole
 
 
       - section: Squads
@@ -500,6 +497,8 @@ navigation:
         icon: fa-light fa-shield-check
         collapsed: true
         contents:
+          - page: JWT authentication
+            path: customization/jwt-authentication.mdx
           - page: GDPR compliance
             path: security-and-privacy/GDPR.mdx
           - page: HIPAA compliance