chore(deps-dev): bump postcss from 8.4.25 to 8.4.26 (#5228)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.25 to 8.4.26.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.4.25...8.4.26)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -79,7 +79,7 @@
     "lockfile-lint": "^4.10.6",
     "nodemon": "^3.0.1",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.4.25",
+    "postcss": "^8.4.26",
     "postcss-cli": "^10.1.0",
     "prettier": "^3.0.0",
     "prettier-plugin-astro": "^0.10.0",