chore: [DevOps] bump org.openapitools:openapi-generator

Bumps the production-minor-patch group with 1 update: [org.openapitools:openapi-generator](https://github.com/openapitools/openapi-generator).


Updates `org.openapitools:openapi-generator` from 7.20.0 to 7.21.0
- [Release notes](https://github.com/openapitools/openapi-generator/releases)
- [Changelog](https://github.com/OpenAPITools/openapi-generator/blob/master/docs/release-summary.md)
- [Commits](OpenAPITools/openapi-generator@v7.20.0...v7.21.0)

---
updated-dependencies:
- dependency-name: org.openapitools:openapi-generator
  dependency-version: 7.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-minor-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -113,7 +113,7 @@
 		<maven-plugin-annotations.version>3.15.2</maven-plugin-annotations.version>
 		<maven-plugin-testing.version>3.5.1</maven-plugin-testing.version>
 		<caffeine.version>3.2.3</caffeine.version>
-		<openapi-generator.version>7.20.0</openapi-generator.version>
+		<openapi-generator.version>7.21.0</openapi-generator.version>
 		<io-swagger-core-v3.version>2.2.45</io-swagger-core-v3.version>
 		<io-swagger-parser-v3.version>2.1.39</io-swagger-parser-v3.version>
 		<io-swagger-core.version>1.6.11</io-swagger-core.version>