Tell players /linkdiscord works in any Discord channel

[Drefvelin]

Summary

• The in-game /linkdiscord reply now says the Discord command can be run in any channel on the server.
• Players were only told to run /linkdiscord <code> in Discord, which left the channel unclear.

Test plan

• Build the pull-request snapshot jar and load it on TFMCDev01
• Run /linkdiscord in game and confirm the reply says the command can be used in any channel on the server
• Confirm an already-linked account still gets the existing linked message, with no channel line

Made with Cursor

[Drefvelin]

Tested tfmcweb-DEV-20260923-1333.jar on TFMCDev01.

• Replaced tfmcweb-1.0.2.jar (backed up under /home/amp/plugin-backups/) and restarted the instance.
• TFMCWeb enabled as DEV-20260923-1333.
• /linkdiscord from a throwaway player returned the click-to-copy code, then: In Discord, run /linkdiscord <code> with that code in any channel on the server. plus the expiry line.