hide udf (#2135)

mkdocs.yml

@@ -81,6 +81,7 @@ plugins:
         - nebula-cloud.md
         - nebula-importer/config-with-header.md
         - nebula-importer/config-without-header.md
+        - 3.ngql-guide/6.functions-and-expressions/9.user-defined-functions.md
         # When publishing a version of a document that includes Enterprise Edition, annotation the following page
         # ent.begin
         # - 3.ngql-guide/6.functions-and-expressions/17.ES-function.md
@@ -94,6 +95,7 @@ plugins:
         # - nebula-dashboard-ent/4.cluster-operator/operator/scale.md
         # - backup-and-restore/nebula-br-ent/*
         # - 6.monitor-and-metrics/3.bbox/*
+        # - 3.ngql-guide/6.functions-and-expressions/9.user-defined-functions.md
         # ent.end
 
         # comm.begin
@@ -348,7 +350,7 @@ nav:
           - Conditional expressions: 3.ngql-guide/6.functions-and-expressions/5.conditional-expressions.md
           - Predicate functions: 3.ngql-guide/6.functions-and-expressions/8.predicate.md
           - Geography functions: 3.ngql-guide/6.functions-and-expressions/14.geo.md
-          - User-defined functions: 3.ngql-guide/6.functions-and-expressions/9.user-defined-functions.md
+#          - User-defined functions: 3.ngql-guide/6.functions-and-expressions/9.user-defined-functions.md
 
       - General queries statements:
           - MATCH: 3.ngql-guide/7.general-query-statements/2.match.md