deps: Bump postcss from 8.5.14 to 8.5.15 (#123)

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.14 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@8.5.14...8.5.15)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.15
  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>

Author: dependabot[bot]

package-lock.json

@@ -160,7 +160,7 @@
     "globals": "17.6.0",
     "jsdom": "^29.0.1",
     "patch-package": "^8.0.1",
-    "postcss": "8.5.14",
+    "postcss": "8.5.15",
     "tailwindcss": "3.4.19",
     "typescript": "5.9.3",
     "vite": "^6.4.2",