Merge pull request #14816 from rabbitmq/dependabot/maven/deps/rabbitmq_auth_backend_http/examples/rabbitmq_auth_backend_spring_boot_kotlin/main/dev-deps-99ed495a02

[skip ci] Bump org.jetbrains.kotlin:kotlin-test from 2.2.20 to 2.2.21 in /deps/rabbitmq_auth_backend_http/examples/rabbitmq_auth_backend_spring_boot_kotlin in the dev-deps group across 1 directory

Author: michaelklishin