docs: update ingress annotation docs (#354)

Co-authored-by: Traky Deng <trakydeng@gmail.com>

Author: github-actions[bot]

docs/en/latest/config.json

@@ -39,7 +39,8 @@
             "items": [
                 "reference/api-reference",
                 "reference/example",
-                "reference/configuration-file"
+                "reference/configuration-file",
+                "reference/ingress-annotation"
             ]
         },
         {