Tejas Tiwari updated the Helm installation documentation for the harness/developer-hub repository, focusing on clarifying deployment instructions to reduce user errors. He revised the default EXPECTED_HOSTNAME value to 'app.harness.io' and explicitly stated that this value should not be replaced in the install command, addressing a common source of confusion during onboarding. The work involved technical writing using Markdown, version control with Git, and a solid understanding of Helm deployment concepts. While the contribution was limited to documentation and did not include bug fixes, it demonstrated attention to detail and improved the clarity and reliability of the installation process for new developers.