chore(deps): update dependency sass-loader to v12 (#1823)

Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: Stephan Köninger <stephan.koeninger@codecentric.de>

Author: 3 people

spring-boot-admin-server-ui/package-lock.json

@@ -82,7 +82,6 @@
     "msw": "0.35.0",
     "msw-storybook-addon": "1.5.0",
     "node-sass": "6.0.1",
-    "sass-loader": "10.2.0",
     "vue-loader": "15.9.8",
     "vue-template-compiler": "2.6.14",
     "webpack-bundle-analyzer": "4.5.0"