Add explicit module to fix IncorrectIndentation's test (chapel-lang#2…

…4911)

Not sure when this broke, but it's broken on 'main'.

The error is that Dyno prints an 'implicit module' warning. The solution
that I find cleanest is to add an explicit module, which also removes a
previously-locked-down linter warning for 'UseExplicitModules'.

The diff is abysmal but all I did in the .good file is increment every
number by one.

Reviewed by @jabraham17 -- thanks!

## Testing

- [x] `start_test test/chplcheck/IncorrectIndentation.chpl`