Update dependency postcss to v8.5.6 (#1287)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -71,7 +71,7 @@
 		"glob": "11.0.3",
 		"husky": "9.1.7",
 		"npm-run-all2": "8.0.4",
-		"postcss": "8.5.5",
+		"postcss": "8.5.6",
 		"prettier": "3.5.3",
 		"ramda": "0.30.1",
 		"rimraf": "6.0.1",