Rewrite release note copy

Author: rachelwhitton

source/releasenotes/2024-09-18-terminus-360.md

@@ -0,0 +1,28 @@
+---
+title: "Terminus 3.6.0 release"
+published_date: "2024-09-23"
+categories: [tools-apis, new-feature]
+---
+Site labels can now be renamed self-serve via Terminus with the new `site:label:set` command. Previously, updating a site's label was only possible by contacting support.
+
+A site on Pantheon has both a machine name and a human-readable label.
+* Machine name (e.g., `my-awesome-site`): used in [Terminus commands](/terminus/examples#siteenv), constructs [platform domains](/guides/domains), and cannot be changed after site creation
+* Human-readable label (e.g., `My Awesome Site`): shown in the Pantheon workspace, site dashboards, and can be changed after site creation via Terminus. For example:  
+
+```shell{promptUser: user}
+terminus site:label:set my-awesome-site "My Awesome Site D11"
+```
+
+Upgrade today to leverage this new command.
+
+## Upgrade Terminus
+Installations managed by Homebrew on MacOS can update with the following command:
+
+```shell{promptUser: user}
+brew upgrade pantheon-systems/external/terminus
+```
+See additional upgrade instructions for other systems [here](/terminus/install).
+
+### Also added
+In addition to this new command, the [Terminus 3.6.0 release](https://github.com/pantheon-systems/terminus/releases/tag/3.6.0) also adds the following:
+- Track command success rates and execution time ([#2623](https://github.com/pantheon-systems/terminus/pull/2623))