Describe the bug

When playing on Windows, the mod tries to save a file named goblintraders:goblin_trader_spawner.dat, which is invalid because of the colon.
This causes the following error to spam the log:
java.nio.file.InvalidPathException: Illegal char <:> at index 73

To Reproduce

1. Open a world with the Goblin Traders mod installed (MC Eternal 2 modpack, 1.20.1).
2. Let goblins spawn naturally or stay in the world for a few minutes.
3. Check the logs — error appears repeatedly:
   "InvalidPathException: Illegal char <:> at index 73 ..."

Expected behavior

The mod should save data using a valid file name, for example goblintraders_goblin_trader_spawner.dat, without illegal characters.

Mod Version

Goblin Traders version: 1.11.5 (for Minecraft 1.20.1)

Minecraft Version

1.20.1

Modloader

Forge 47.4.2

Crash Log (if applicable)

https://gist.github.com/fedekk2014/f6964d67e1e16b5b6ff57a5943594e02

Additional context

No response