chore(deps): update dependency postcss-nested to v7

Author: renovate[bot]

playground/vue-sourcemap/package.json

@@ -11,7 +11,7 @@
   "devDependencies": {
     "@vitejs/plugin-vue": "workspace:*",
     "less": "^4.2.0",
-    "postcss-nested": "^6.2.0",
+    "postcss-nested": "^7.0.2",
     "sass": "^1.77.8"
   },
   "dependencies": {