Bump @stoplight/spectral-cli from 6.11.1 to 6.15.0

Bumps [@stoplight/spectral-cli](https://github.com/stoplightio/spectral) from 6.11.1 to 6.15.0.
- [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-6.11.1...@stoplight/spectral-cli-6.15.0)

---
updated-dependencies:
- dependency-name: "@stoplight/spectral-cli"
  dependency-version: 6.15.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -20,7 +20,7 @@
   "devDependencies": {
     "@openapitools/openapi-generator-cli": "^2.13.4",
     "@stoplight/prism-cli": "^5.7.0",
-    "@stoplight/spectral-cli": "^6.11.1",
+    "@stoplight/spectral-cli": "^6.15.0",
     "chokidar-cli": "^3.0.0",
     "npm-run-all": "^4.1.5",
     "prettier": "^3.2.5",