Standardizes the Joomla update server filename to `updates.xml` (plural)
across all .tf definitions, workflow templates, and automation scripts.
The singular `update.xml` was inconsistent with the Joomla convention
and the updates.xml.template already in use.
Files fixed: 16 (definitions, templates, automation scripts)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Jonathan Miller
4742dfcbec