Bump mini-css-extract-plugin in /extensions/ql-vscode (#3365)

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 2.7.7 to 2.8.0.
- [Release notes](https://github.com/webpack-contrib/mini-css-extract-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/mini-css-extract-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack/mini-css-extract-plugin@v2.7.7...v2.8.0)

---
updated-dependencies:
- dependency-name: mini-css-extract-plugin
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

extensions/ql-vscode/package-lock.json

@@ -2046,7 +2046,7 @@
     "lint-staged": "^15.0.2",
     "markdownlint-cli2": "^0.12.1",
     "markdownlint-cli2-formatter-pretty": "^0.0.5",
-    "mini-css-extract-plugin": "^2.7.7",
+    "mini-css-extract-plugin": "^2.8.0",
     "npm-run-all": "^4.1.5",
     "patch-package": "^8.0.0",
     "prettier": "^3.2.5",