chore(deps-dev): bump cssnano from 6.1.2 to 7.1.5

Bumps [cssnano](https://github.com/cssnano/cssnano) from 6.1.2 to 7.1.5.
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano@6.1.2...cssnano@7.1.5)

---
updated-dependencies:
- dependency-name: cssnano
  dependency-version: 7.1.5
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -51,7 +51,7 @@
     "@types/react": "^17 || ^18 || ^19",
     "@types/react-dom": "^17 || ^18 || ^19",
     "autoprefixer": "^10.4.17",
-    "cssnano": "^6.0.3",
+    "cssnano": "^7.1.5",
     "postcss": "^8.4.33",
     "postcss-cli": "^11.0.0",
     "postcss-nesting": "^12.0.2",