[DOCS-10755] Add site restriction (#29109)

* [DOCS-10755] Add site restriction

* Update site restriction

Author: buraizu

content/en/metrics/guide/dynamic_quotas.md

@@ -18,15 +18,19 @@ private: true
 
 ## Overview
 
+{{< site-region region="gov" >}}
+<div class="alert alert-warning">Dynamic Metric Quotas are not supported for your selected <a href="/getting_started/site">Datadog site</a> ({{< region-param key="dd_site_name" >}}).</div>
+{{< /site-region >}}
+
 {{< callout url="#" btn_hidden="true" header="Join the Preview!" >}}
-  This feature is currently in Preview.
+  This feature is in Preview.
 {{< /callout >}} 
 
-Datadog’s Dynamic Metrics Quotas offers you greater control over your custom metrics cost through custom metrics quotas for accounts, teams, or metric names. You define a metric monitor on your [estimated usage metrics][10], and when triggered, the monitor launches a workflow through [Workflow Automation][3]. 
+Datadog's Dynamic Metrics Quotas offers you greater control over your custom metrics cost through custom metrics quotas for accounts, teams, or metric names. You define a metric monitor on your [estimated usage metrics][10], and when triggered, the monitor launches a workflow through [Workflow Automation][3]. 
 
-The workflow sends a Slack (or Microsoft Teams) message asking for permission to automatically apply [Metrics without Limits™][1] configurations to the triggering metrics, reducing the usage and cost of these metrics on your behalf. These configuration updates are generated by Datadog’s intelligent query insights, which uses a list of the actively queried tags to ensure that your cost-optimized configuration doesn’t sacrifice visibility.
+The workflow sends a Slack (or Microsoft Teams) message asking for permission to automatically apply [Metrics without Limits™][1] configurations to the triggering metrics, reducing the usage and cost of these metrics on your behalf. These configuration updates are generated by Datadog's intelligent query insights, which uses a list of the actively queried tags to ensure that your cost-optimized configuration doesn't sacrifice visibility.
 
-See the [Best Practices Guide for Custom Metrics Governance][11] for more information about monitoring and preventing overages and sudden spikes in your overall account’s custom metrics usage.
+See the [Best Practices Guide for Custom Metrics Governance][11] for more information about monitoring and preventing overages and sudden spikes in your overall account's custom metrics usage.
 
 ## Setup