Update dependency stylelint-config-sass-guidelines to v12 (#98213)

* Update dependency stylelint-config-sass-guidelines to v12

* fix stylelint issues

* fix indentation

* update snapshots

* linting...

* linting...

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Ashley Harrison <ashley.harrison@grafana.com>

package.json

@@ -231,7 +231,7 @@
     "smtp-tester": "^2.1.0",
     "style-loader": "4.0.0",
     "stylelint": "16.12.0",
-    "stylelint-config-sass-guidelines": "11.1.0",
+    "stylelint-config-sass-guidelines": "12.1.0",
     "terser-webpack-plugin": "5.3.11",
     "testing-library-selector": "0.3.1",
     "tracelib": "1.0.1",