chore(main): release 0.6.0

[github-actions[bot]]

:robot: I have created a release beep boop

0.6.0 (2023-08-25)

Features

• add the hb.styles parameter for defining Sass variables (#66) (a0b6dad)
• add the top offset mixin and CSS variable (#67) (45337f1)

Bug Fixes

• deps: update dependency stylelint-scss to v5.1.0 (486c8a7)

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[github-actions[bot]]

:robot: Release is at https://github.com/hbstack/hb/releases/tag/v0.6.0 :sunflower: