chore: bump @stoplight/spectral-cli in the npm group

Bumps the npm group with 1 update: [@stoplight/spectral-cli](https://github.com/stoplightio/spectral).


Updates `@stoplight/spectral-cli` from 6.15.1 to 6.16.0
- [Release notes](https://github.com/stoplightio/spectral/releases)
- [Changelog](https://github.com/stoplightio/spectral/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/stoplightio/spectral/compare/@stoplight/spectral-cli-6.15.1...@stoplight/spectral-cli-6.16.0)

---
updated-dependencies:
- dependency-name: "@stoplight/spectral-cli"
  dependency-version: 6.16.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: npm
...

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

Author: dependabot[bot]

package-lock.json

@@ -2,6 +2,6 @@
   "devDependencies": {
     "prettier": "^3.8.3",
     "@prettier/plugin-php": "^0.25.0",
-    "@stoplight/spectral-cli": "^6.15.1"
+    "@stoplight/spectral-cli": "^6.16.0"
   }
 }