weechat: Update to 4.1.2

Changelog:
Version 4.1.2 (2023-12-03)

Bug fixes
      o core: fix value of buffer variable "num_history" when the value defined
        in option weechat.history.max_commands is reached

      o core: remove incorrect warning when binding keys F10 to F20 (issue #
        2039)

      o core: fix memory leak when config version is invalid or not supported

      o core: fix crash when "config_version" is present in a configuration
        file without a value

      o core: display an error on startup if environment variable "HOME" is not
        set

      o irc: remove trailing "\r\n" in signals "irc_out" and "irc_outtags" when
        messages are queued

      o irc: fix target buffer of IRC message 337 (whois reply: "is hiding
        their idle time")

      o relay: close properly connection with the IRC client in case of server
        disconnection (issue #2038)

      o ruby: fix use of NULL variable when displaying exception

(ryoon)