Bump to `brainglobe-atlasapi` dependency
`bg-atlasapi` has been renamed to `brainglobe-atlasapi`, so we now depend on the new package.
What's Changed
* bg-atlasapi -> brainglobe-atlasapi by willGraham01 in https://github.com/brainglobe/brainglobe-utils/pull/39
**Full Changelog**: https://github.com/brainglobe/brainglobe-utils/compare/v0.4.0...v0.4.1