Bump cssnano from 7.0.5 to 7.0.6

Bumps [cssnano](https://github.com/cssnano/cssnano) from 7.0.5 to 7.0.6.
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/[email protected]@7.0.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -32,7 +32,7 @@
     "@web/dev-server-esbuild": "^1.0.2",
     "@web/rollup-plugin-html": "^2.3.0",
     "@web/test-runner": "^0.18.3",
-    "cssnano": "^7.0.5",
+    "cssnano": "^7.0.6",
     "eslint": "^9.9.1",
     "eslint-plugin-prettier": "^5.2.1",
     "open-props": "^1.7.6",