fix: replace sass division with multiplication (fixes #6830)

[z1m1n]

Describe the PR

Replace Sass division with multiplication (required for sass versions greater than 1.32.13) (fixes #6830)

PR checklist

What kind of change does this PR introduce? (check at least one)

• Bugfix (fixes a boo-boo in the code) - fix(...), requires a patch version update
• Feature (adds a new feature to BootstrapVue) - feat(...), requires a minor version update
• Enhancement (augments an existing feature) - feat(...), requires a minor version update
• ARIA accessibility (fixes or improves ARIA accessibility) - fix(...), requires a patch or minor version update
• Documentation update (improves documentation or typo fixes) - chore(docs), requires a patch version update
• Other (please describe)

Does this PR introduce a breaking change?

• No
• Yes

The PR fulfills these requirements:

• It's submitted to the dev branch, not the master branch
• When resolving a specific issue, it's referenced in the PR's title (i.e. [...] (fixes #xxx[,#xxx]), where "xxx" is the issue number)
• It should address only one issue or feature. If adding multiple features or fixing a bug and adding a new feature, break them into separate PRs if at all possible.
• The title should follow the Conventional Commits naming convention (i.e. fix(alert): not alerting during SSR render, docs(badge): update pill examples, chore(docs): fix typo in README, etc.). This is very important, as the CHANGELOG is generated from these messages, and determines the next version type (patch or minor).

If new features/enhancement/fixes are added or changed:

• Includes documentation updates
• Includes component package.json meta section updates (prop, slot and event changes/updates)
• Includes any needed TypeScript declaration file updates
• New/updated tests are included and passing (required for new features and enhancements)
• Existing test suites are passing
• CodeCov for patch has met target (all changes/updates have been tested)
• The changes have not impacted the functionality of other components or directives
• ARIA Accessibility has been taken into consideration (Does it affect screen reader users or keyboard only users? Clickable items should be in the tab index, etc.)

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[z1m1n]

@jacobmllr95 Please take a look

[AdamGaskins]

I triumphantly updated my bootstrap version to v4.6.1 before realizing bootstrap-vue had sass division too. Came here to make a PR but @z1m1n beat me too it! Thank you 👏🏻

[jonybekov]

Can we please merge this PR?

[sebsonjura]

get this merged asap please ;)

[panreach]

Bump

[xanf]

I'm going to merge this today :) Just need to filter-out extra white-space changes :)

[codecov]

Codecov Report

Merging #6834 (017d46c) into dev (abaa1c5) will not change coverage.
The diff coverage is n/a.

❗ Current head 017d46c differs from pull request most recent head 1510721. Consider uploading reports for the commit 1510721 to get more accurate results

@@            Coverage Diff            @@
##               dev     #6834   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          299       299           
  Lines        10263     10263           
  Branches      2523      2523           
=========================================
  Hits         10263     10263           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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[xanf]

@z1m1n thank you for your contribution! I'm happy to merge it 🚀