add apisix docs to menu (argoproj#2472)

Signed-off-by: zachaller <[email protected]>

Signed-off-by: zachaller <[email protected]>

Author: zachaller

mkdocs.yml

@@ -45,6 +45,7 @@ nav:
 - Traffic Management:
   - Overview: features/traffic-management/index.md
   - Ambassador: features/traffic-management/ambassador.md
+  - APISIX: features/traffic-management/apisix.md
   - AWS ALB: features/traffic-management/alb.md
   - Istio: features/traffic-management/istio.md
   - NGINX: features/traffic-management/nginx.md