Build(deps-dev): Bump postcss from 8.4.25 to 8.4.26 (#38927)

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

@@ -140,7 +140,7 @@
     "lockfile-lint": "^4.10.6",
     "nodemon": "^3.0.1",
     "npm-run-all2": "^6.0.6",
-    "postcss": "^8.4.25",
+    "postcss": "^8.4.26",
     "postcss-cli": "^10.1.0",
     "rollup": "^3.26.2",
     "rollup-plugin-istanbul": "^4.0.0",