chore(deps-dev): bump postcss from 8.5.6 to 8.5.15

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.6 to 8.5.15.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.6...8.5.15)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.15
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -76,7 +76,7 @@
     "eslint": "^8.56.0",
     "jest": "^29.7.0",
     "nodemon": "^3.1.11",
-    "postcss": "^8.4.31",
+    "postcss": "^8.5.15",
     "supertest": "^6.3.3",
     "swagger-jsdoc": "^6.2.8",
     "tailwindcss": "^4.1.18"