Bump postcss from 8.4.48 to 8.4.49

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.48 to 8.4.49.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.48...8.4.49)

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

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

package.json

@@ -40,7 +40,7 @@
     "@web/test-runner": "^0.19.0",
     "eslint": "^8.57.1",
     "open-props": "^1.7.7",
-    "postcss": "^8.4.48",
+    "postcss": "^8.4.49",
     "postcss-cli": "^11.0.0",
     "postcss-import": "^16.1.0",
     "postcss-jit-props": "^1.0.14",