Fix Malformed list property in quark.cfg:1400

[J0B10]

52 was tested and worked but then before committing some spaces seemed to sneak in and broke everything. 😅

This resulted in a broken config and some errors:

[10:23:11] [Client thread/FATAL] [FML]: An exception occurred while loading config file quark.cfg. This file will be renamed to quark.cfg_20210903_102311.errored and a new config file will be generated.
java.lang.RuntimeException: Malformed list property "D:/MultiMC/instances/SkyblockNachfolger_dev/.minecraft/config/quark.cfg:1400"
    at net.minecraftforge.common.config.Configuration.load(Configuration.java:1000) ~[Configuration.class:?]
    at net.minecraftforge.common.config.Configuration.runConfiguration(Configuration.java:129) [Configuration.class:?]
    at net.minecraftforge.common.config.Configuration.<init>(Configuration.java:146) [Configuration.class:?]
    at net.minecraftforge.common.config.Configuration.<init>(Configuration.java:107) [Configuration.class:?]
    at vazkii.quark.base.module.ModuleLoader.setupConfig(ModuleLoader.java:146) [ModuleLoader.class:?]
    at vazkii.quark.base.module.ModuleLoader.preInit(ModuleLoader.java:100) [ModuleLoader.class:?]
    at vazkii.quark.base.proxy.CommonProxy.preInit(CommonProxy.java:34) [CommonProxy.class:?]
    at vazkii.quark.base.proxy.ClientProxy.preInit(ClientProxy.java:47) [ClientProxy.class:?]
    at vazkii.quark.base.Quark.preInit(Quark.java:44) [Quark.class:?]

    ...

Thanks to @voruti for unintentionally making me aware of it by posting this diff on discord: