Update dependency sass-loader to v12.6.0

Author: renovate-bot

package.json

@@ -36,7 +36,7 @@
     "eslint": "7.32.0",
     "eslint-plugin-vue": "7.17.0",
     "node-sass": "6.0.1",
-    "sass-loader": "12.1.0",
+    "sass-loader": "12.6.0",
     "vue-template-compiler": "2.6.14"
   },
   "eslintConfig": {