feat(mute alerts): Add mute alerts docs (#6948)

* feat(mute alerts): Add mute alerts docs

* add permissions banner

* settings

Author: ceorourke

src/docs/product/alerts/index.mdx

@@ -44,6 +44,16 @@ You can find a full list of available metric alerts in [Metric Alerts](/product/
 
 When you create a new project in [sentry.io](https://sentry.io), you can select a default issue alert. However, you can also [create your own alerts](/product/alerts/create-alerts/) to suit your team’s needs, using these [best practices](/product/alerts/best-practices/) as a guide.
 
+## Muting Alerts
+
+<Note>
+
+By default all users can mute alerts for everyone. Sentry users with manager or owner permissions can change the minimum role requirement in **Settings > General Settings > Let Members Create and Edit Alerts**.
+
+</Note>
+
+Issue alerts can be muted on the alert rule details page by clicking the "Mute" button. This will mute the alert from notifying you until you click "Unmute". If you want to mute the alert from firing entirely, select "Mute for everyone" from the dropdown.
+
 ## Notifications
 
 Besides alerts, Sentry sends you notifications about various things like [issue state changes](/product/issues/states-triage/), [release deploys](/product/releases/), and [quota usage](/product/accounts/quotas/). You can fine tune these notifications, as well as your personal alert settings, in **User Settings > Notifications**. Learn more about notifications and adjusting their associated settings in [the full documentation](/product/alerts/notifications/).