chore(deps-dev): bump the npm-deps group (#37)

Bumps the npm-deps group in /themes/conventional-branch with 4 updates: [cssnano](https://github.com/cssnano/cssnano), [sass](https://github.com/sass/dart-sass), [postcss](https://github.com/postcss/postcss) and [webpack](https://github.com/webpack/webpack).


Updates `cssnano` from 7.0.6 to 7.0.7
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano@7.0.6...cssnano@7.0.7)

Updates `sass` from 1.87.0 to 1.89.1
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.87.0...1.89.1)

Updates `postcss` from 8.5.3 to 8.5.4
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.3...8.5.4)

Updates `webpack` from 5.99.7 to 5.99.9
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v5.99.7...v5.99.9)

---
updated-dependencies:
- dependency-name: cssnano
  dependency-version: 7.0.7
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm-deps
- dependency-name: sass
  dependency-version: 1.89.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: npm-deps
- dependency-name: postcss
  dependency-version: 8.5.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm-deps
- dependency-name: webpack
  dependency-version: 5.99.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm-deps
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]