Fix dep warnings

fix for this dep warning:

Deprecation Warning: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.

Recommendation: math.div($spacing-unit, 2) or calc($spacing-unit / 2)

More info and automated migrator: https://sass-lang.com/d/slash-div

assigned to @laurent.heirendt

added 1 commit

• 6bad8098 - use latest jekyll img

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mentioned in commit 80be9b9e

merged