Bump org.openapitools:jackson-databind-nullable

Bumps the api-build-tools group with 1 update: [org.openapitools:jackson-databind-nullable](https://github.com/OpenAPITools/jackson-databind-nullable).


Updates `org.openapitools:jackson-databind-nullable` from 0.2.6 to 0.2.8
- [Release notes](https://github.com/OpenAPITools/jackson-databind-nullable/releases)
- [Commits](OpenAPITools/jackson-databind-nullable@v0.2.6...v0.2.8)

---
updated-dependencies:
- dependency-name: org.openapitools:jackson-databind-nullable
  dependency-version: 0.2.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: api-build-tools
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -31,7 +31,7 @@ wiremock = '3.9.1'
 testcontainers = '1.20.6'
 swagger-integration-jakarta = '2.2.28'
 jakarta-annotation-api = '2.1.1'
-jackson-databind-nullable = '0.2.6'
+jackson-databind-nullable = '0.2.8'
 antlr = '4.13.2'
 json-schema-validator = '2.2.14'
 checkstyle = '10.24.0'