chore(deps): update dependency org.openapi.generator to v7.20.0 (#91)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -7,7 +7,7 @@ junit = "6.0.3"
 kotlin = "2.3.10"
 mapstruct = "1.7.0.Beta1"
 mockk = "1.14.9"
-openapi = "7.19.0"
+openapi = "7.20.0"
 postgresql = "42.7.10"
 slf4j = "2.0.17"
 spring-boot = "4.0.3"