chore(deps): update dependency less-loader to v9 (#4080)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package.json

@@ -141,7 +141,7 @@
     "json-templater": "^1.2.0",
     "jsonp": "^0.2.1",
     "less": "^4.0.0",
-    "less-loader": "^8.0.0",
+    "less-loader": "^9.0.0",
     "less-plugin-npm-import": "^2.1.0",
     "less-vars-to-js": "^1.3.0",
     "lint-staged": "^11.0.0",