[ruby/ipaddr] Bump up v1.2.6

https://github.com/ruby/ipaddr/commit/247459faa5
2023-12-16 13:20:16 +08:00 · 2023-12-16 13:20:16 +08:00 · 4fd3c85acd
--- a/lib/ipaddr.rb
+++ b/lib/ipaddr.rb
@ -40,7 +40,7 @@ require 'socket'
 #   p ipaddr3                   #=> #<IPAddr: IPv4:192.168.2.0/255.255.255.0>

 class IPAddr
-  VERSION = "1.2.5"
+  VERSION = "1.2.6"

  # 32 bit mask for IPv4
  IN4MASK = 0xffffffff