Fix inconsistency in documentation

[Silveere]

I noticed that the type for Palette Modification and List Modification resources in the documentation were palette_modification and list_modification respectively, meanwhile the example JSON as well as the resource loader code say they should be paletteModification and listModification.

[what-the-diff[bot]]

PR Summary

• Modification in Palette Definitions In '4. Palette Modifications.md', there's a change in the way we name 'type'. We used to call it 'palette_modification', now it's updated to 'paletteModification' to enhance consistency.

• Modification in List Definitions Similarly, in '5. List Modifications.md', the 'type' key name has also been improved. It changed from 'list_modification' to 'listModification'. This makes our code cleaner and easier to understand.

[tr7zw]

Oops correct.