Cherry-pick: Making sure to kebab case CSS variables generated from presets#44472

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michalczaplinski wants to merge 1 commit intowp/6.1from cherry-pick/style-engine-kebabcase-preset-slugs-in-editor

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Commits on Sep 26, 2022

Making sure to kebab case CSS variables generated from presets, so h1 will become h-1 (#44406 )

ramonjd
authored and
michalczaplinski
committed