Bump gradle from 8.12-jdk21 to 8.13-jdk21#148

dependabot[bot] wants to merge 1 commit intomainexercism/java-test-runner:mainfrom

dependabot/docker/gradle-8.13-jdk21exercism/java-test-runner:dependabot/docker/gradle-8.13-jdk21Copy head branch name to clipboard