Add terminus 3.6.0 release (#9232)

* Add terminus 3.6.0 release

* Rewrite release note copy

* Update 2024-09-23-terminus-360.md

---------

Co-authored-by: Rachel Whitton <rachel@pantheon.io>
Co-authored-by: Ingrid <148255657+IngridKwok@users.noreply.github.com>

source/releasenotes/2024-09-23-terminus-360.md

@@ -0,0 +1,27 @@
+---
+title: "New self-serve command in Terminus 3.6.0 for renaming site labels"
+published_date: "2024-09-23"
+categories: [tools-apis, new-feature]
+---
+With the [Terminus 3.6.0 release](https://github.com/pantheon-systems/terminus/releases/tag/3.6.0), you can now rename site labels directly through Terminus using the new `site:label:set` command. Previously, updating a site's label required 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 and site dashboards. This label 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 take advantage of this new command.**
+
+## How to upgrade Terminus
+If you manage your installation via Homebrew on macOS, you can update Terminus with the following command:
+
+```shell{promptUser: user}
+brew upgrade pantheon-systems/external/terminus
+```
+For other systems, see additional upgrade instructions [here](/terminus/install).
+
+### Additional updates in Terminus 3.6.0
+Tracking of command success rates and execution time ([#2623](https://github.com/pantheon-systems/terminus/pull/2623)).