docs/cidrnetmask: Address confusing note about IPv6 (#37029)

website/docs/language/functions/cidrnetmask.mdx

@@ -20,8 +20,8 @@ cidrnetmask(prefix)
 The result is a subnet address formatted in the conventional dotted-decimal
 IPv4 address syntax, as expected by some software.
 
-CIDR notation is the only valid notation for IPv6 addresses, so `cidrnetmask`
-produces an error if given an IPv6 address.
+The `cidrnetmask` function only accepts IPv4 addresses in CIDR notation.
+If you use an IPv6 address, `cidrnetmask` returns an error. 
 
 -> **Note:** As a historical accident, this function interprets IPv4 address
 octets that have leading zeros as decimal numbers, which is contrary to some