Bump stylelint-config-twbs-bootstrap from 3.0.1 to 3.1.0 (#36428)

* Bump stylelint-config-twbs-bootstrap from 3.0.1 to 3.1.0

Bumps [stylelint-config-twbs-bootstrap](https://github.com/twbs/stylelint-config-twbs-bootstrap) from 3.0.1 to 3.1.0.
- [Release notes](https://github.com/twbs/stylelint-config-twbs-bootstrap/releases)
- [Commits](https://github.com/twbs/stylelint-config-twbs-bootstrap/compare/v3.0.1...v3.1.0)

---
updated-dependencies:
- dependency-name: stylelint-config-twbs-bootstrap
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update .stylelintrc

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>

.stylelintrc

@@ -3,7 +3,6 @@
     "stylelint-config-twbs-bootstrap"
   ],
   "rules": {
-    "custom-property-empty-line-before": null,
     "declaration-property-value-disallowed-list": {
       "border": "none",
       "outline": "none"