Bump postcss from 8.5.19 to 8.5.26

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.19 to 8.5.26.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.19...8.5.26)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.23
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -16,7 +16,7 @@
     "esbuild": "^0.28.1",
     "lodash": "^4.18.1",
     "nodemon": "^3.1.14",
-    "postcss": "^8.5.19",
+    "postcss": "^8.5.26",
     "postcss-cli": "^11.0.1",
     "sass": "^1.101.0",
     "trix": "^2.1.19"