How to modify the UpgradeTemplate.xaml to enable releasing from a build

This post details how to modify the `UpgradeTemplate.xaml` build process template to enable triggering releases from a build. It provides specific snippets and instructions for integrating release-specific customizations into existing custom `UpgradeTemplate.xaml` files, and outlines considerations for using the `ReleaseUpgradeTemplate.xaml` build process template, including installing the Release Management client and configuring build definition parameters like `Release Build` and `Release Target Stage`.