Bump postcss from 8.5.2 to 8.5.3 in /live-editor

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.2 to 8.5.3.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.2...8.5.3)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

live-editor/package.json

@@ -21,7 +21,7 @@
     "monaco-yaml": "file:./src/monaco-yaml",
     "pako": "^2.1.0",
     "path-browserify": "^1.0.0",
-    "postcss": "^8.5.2",
+    "postcss": "^8.5.3",
     "postcss-load-config": "^5.1.0",
     "prettier": "3.5.1",
     "svelte": "^3.59.2",

live-editor/yarn.lock

@@ -1784,10 +1784,10 @@ postcss-value-parser@^4.0.0, postcss-value-parser@^4.2.0:
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz#723c09920836ba6d3e5af019f92bc0971c02e514"
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
-postcss@^8.4.43, postcss@^8.4.47, postcss@^8.5.2:
-  version "8.5.2"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.2.tgz#e7b99cb9d2ec3e8dd424002e7c16517cb2b846bd"
-  integrity sha512-MjOadfU3Ys9KYoX0AdkBlFEF1Vx37uCCeN4ZHnmwm9FfpbsGWMZeBLMmmpY+6Ocqod7mkdZ0DT31OlbsFrLlkA==
+postcss@^8.4.43, postcss@^8.4.47, postcss@^8.5.3:
+  version "8.5.3"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.3.tgz#1463b6f1c7fb16fe258736cba29a2de35237eafb"
+  integrity sha512-dle9A3yYxlBSrt8Fu+IpjGT8SY8hN0mlaA6GY8t0P5PjIOZemULz/E2Bnm/2dcUOena75OTNkHI76uZBNUUq3A==
   dependencies:
     nanoid "^3.3.8"
     picocolors "^1.1.1"