Bump @openapitools/openapi-generator-cli from 2.18.4 to 2.20.0

Bumps [@openapitools/openapi-generator-cli](https://github.com/OpenAPITools/openapi-generator-cli) from 2.18.4 to 2.20.0.
- [Release notes](https://github.com/OpenAPITools/openapi-generator-cli/releases)
- [Changelog](https://github.com/OpenAPITools/openapi-generator-cli/blob/master/.releaserc)
- [Commits](OpenAPITools/openapi-generator-cli@v2.18.4...v2.20.0)

---
updated-dependencies:
- dependency-name: "@openapitools/openapi-generator-cli"
  dependency-version: 2.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -5,7 +5,7 @@
   },
   "description": "",
   "devDependencies": {
-    "@openapitools/openapi-generator-cli": "^2.18.4",
+    "@openapitools/openapi-generator-cli": "^2.20.0",
     "openapi-typescript": "^7.6.1",
     "orval": "^7.8.0"
   },