[Docs] Mention ip_range datatypes on ip type page (#31416)

A link to the ip_range datatype page provides a way for newer users to know
it exists if they land directly on the ip datatype page first via a search.

Author: geekpete

docs/reference/mapping/types/ip.asciidoc

@@ -36,6 +36,8 @@ GET my_index/_search
 // CONSOLE
 // TESTSETUP
 
+NOTE: You can also store ip ranges in a single field using an <<range,ip_range datatype>>.
+
 [[ip-params]]
 ==== Parameters for `ip` fields