Docs: Add a note about deprecating the settings update API (#87552)

* add a note about deprecating the settings update API

* Update docs/sources/setup-grafana/configure-grafana/settings-updates-at-runtime/index.md

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

---------

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

docs/sources/setup-grafana/configure-grafana/settings-updates-at-runtime/index.md

@@ -17,7 +17,7 @@ weight: 500
 # Settings updates at runtime
 
 {{% admonition type="note" %}}
-Available in Grafana Enterprise version 8.0 and later.
+This functionality is deprecated and will be removed in a future release. For configuring SAML authentication, please use the new [SSO settings API]({{< relref "../../../developers/http_api/sso-settings" >}}).
 {{% /admonition %}}
 
 By updating settings at runtime, you can update Grafana settings without needing to restart the Grafana server.