docs: add GitLab-specific Tailwind migration tips

See merge request gitlab-org/gitlab-ui!4410



Merged-by: Lukas Eipert <leipert@gitlab.com>
Approved-by: Lukas Eipert <leipert@gitlab.com>
Co-authored-by: Paul Gascou-Vaillancourt <paul.gascvail@gmail.com>

Fixes an issue that prevented the sparkline from being rendered when
the gradient prop was configured.

chore(deps): update dependency @gitlab/eslint-plugin to v19.6.0

See merge request gitlab-org/gitlab-ui!4411



Merged-by: Paul Slaughter <pslaughter@gitlab.com>
Approved-by: Paul Slaughter <pslaughter@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>

fix(GlSparklineChart): Render flat lines with gradient enabled

See merge request gitlab-org/gitlab-ui!4407



Merged-by: Peter Hegman <phegman@gitlab.com>
Approved-by: Artur Fedorov <afedorov@gitlab.com>
Approved-by: Peter Hegman <phegman@gitlab.com>
Reviewed-by: Artur Fedorov <afedorov@gitlab.com>
Reviewed-by: Alex Pennells <apennells@gitlab.com>
Co-authored-by: Alex Pennells <apennells@gitlab.com>

## [86.13.1](gitlab-org/gitlab-ui@v86.13.0...v86.13.1) (2024-07-18)

### Bug Fixes

* **GlSparklineChart:** Render flat lines with gradient enabled ([a8ad20f3](gitlab-org/gitlab-ui@a8ad20f3))