net: fix IPv4 validation regex

Fixed the IPv4's validation regex so it also matches IPv4 octets that
are prefixed by a `0` as they're also considered valid octets.

Fixes: nodejs#40173

Author: VoltrexKeyva

lib/internal/net.js

@@ -11,8 +11,8 @@ const { writeBuffer } = internalBinding('fs');
 const errors = require('internal/errors');
 
 // IPv4 Segment
-const v4Seg = '(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])';
-const v4Str = `(${v4Seg}[.]){3}${v4Seg}`;
+const v4Seg = '(?:[0-9]|[0-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])';
+const v4Str = `(?:${v4Seg}\\.){3}${v4Seg}`;
 const IPv4Reg = new RegExp(`^${v4Str}$`);
 
 // IPv6 Segment