chore(deps): update dependency org.junit.jupiter:junit-jupiter to v6

[dd-octo-sts]

This PR contains the following updates:

Package	Type	Update	Change
org.junit.jupiter:junit-jupiter (source)	dependencies	major	5.14.4 → 6.1.3

🚨 Gradle Security Update (Major) - CRITICAL

This PR addresses critical severity security vulnerabilities in Gradle dependencies with major version changes.

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• Version Upgrader Overview

• Questions or feedback? Ask in #adms-version-upgrades

🤖 Generated by ADMS (Automated Dependency Management System)

🚨 Gradle Security Update (Major) - HIGH

This PR addresses high severity security vulnerabilities in Gradle dependencies with major version changes.

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Dependency resolution failed: 'org.junit.jupiter:junit-jupiter:6.1.3' is not compatible with JVM 8; requires JVM 17 or newer.

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[mcculls]

We can't update to JUnit 6 because we need to run tests on Java 8, and JUnit 6 has a baseline of Java 17 - instead we track the latest changes on JUnit 5 (and its 1.x platform launcher)