net: fix the doc string on parseIPv6

Change-Id: Ie9fef7767f3263ef7daed8415ab2f59c5377a3cb
GitHub-Last-Rev: a4d13b7452f0fe060cb7575acfc200e3353fdde0
GitHub-Pull-Request: golang/go#32385
Reviewed-on: https://go-review.googlesource.com/c/go/+/180037Reviewed-by: Agniva De Sarker <agniva.quicksilver@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/net/ip.go

@@ -565,7 +565,7 @@ func parseIPv6Zone(s string) (IP, string) {
 	return parseIPv6(s), zone
 }
 
-// parseIPv6Zone parses s as a literal IPv6 address described in RFC 4291
+// parseIPv6 parses s as a literal IPv6 address described in RFC 4291
 // and RFC 5952.
 func parseIPv6(s string) (ip IP) {
 	ip = make(IP, IPv6len)