chore(deps): update dependency postcss-nested to v7 (#18564)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

playground/css/package.json

@@ -22,7 +22,7 @@
     "@vitejs/test-css-proxy-dep": "file:./css-proxy-dep",
     "@vitejs/test-scss-proxy-dep": "file:./scss-proxy-dep",
     "less": "^4.2.0",
-    "postcss-nested": "^6.2.0",
+    "postcss-nested": "^7.0.2",
     "sass": "^1.80.4",
     "stylus": "^0.64.0",
     "sugarss": "^4.0.1",