Error in appearance settings view name

[chriskormaris]

https://github.com/aileftech/snap-admin/blob/297224dafe486cb45666c4a33907ea1f4c94bc2d/src/main/resources/templates/snapadmin/settings/appearance.html#L34C1-L35C1

I found this bug when testing the app.
Correct view name should be:

"snapadmin/settings/appearance"