Worked on the payara/Payara repository to update the contributing guidelines, ensuring that all contributors use JDK 21 for building the project instead of the previously required JDK 11. This change involved revising documentation written in Markdown to reflect the new Java version requirements, aiming to reduce build failures and streamline the onboarding process for new developers. The update leveraged skills in Java and Maven, focusing on aligning the build environment with current standards. No bugs were addressed during this period, as the primary focus was on documentation improvements that lay the foundation for future compatibility and smoother development workflows.