Bump css-loader from 6.7.1 to 7.1.2

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 6.7.1 to 7.1.2.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack/css-loader@v6.7.1...v7.1.2)

---
updated-dependencies:
- dependency-name: css-loader
  dependency-version: 7.1.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -24,7 +24,7 @@
     "azure-devops-extension-sdk": "^4.0.2",
     "azure-devops-ui": "^2.251.0",
     "copy-webpack-plugin": "^11.0.0",
-    "css-loader": "^6.11.0",
+    "css-loader": "^7.1.2",
     "jsonpath": "^1.1.1",
     "lodash": "^4.17.21",
     "office-ui-fabric-react": "^6.214.0",