Docs: Update email notifier documentation (#22919)

* Docs: Update email notifier documentation

Ref #21091

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

docs/sources/administration/provisioning.md

@@ -240,7 +240,7 @@ When Grafana starts, it will update/insert all dashboards available in the confi
 It's possible to make changes to a provisioned dashboard in the Grafana UI. However, it is not possible to automatically save the changes back to the provisioning source.
 It's possible to make changes to a provisioned dashboard in the Grafana UI. However, it is not possible to automatically save the changes back to the provisioning source.
 If `allowUiUpdates` is set to `true` and you make changes to a provisioned dashboard, you can `Save` the dashboard then changes will be persisted to the Grafana database.
 If `allowUiUpdates` is set to `true` and you make changes to a provisioned dashboard, you can `Save` the dashboard then changes will be persisted to the Grafana database.
 
 
-> **Note.** 
+> **Note:**
 > If a provisioned dashboard is saved from the UI and then later updated from the source, the dashboard stored in the database will always be overwritten. The `version` property in the JSON file will not affect this, even if it is lower than the existing dashboard.
 > If a provisioned dashboard is saved from the UI and then later updated from the source, the dashboard stored in the database will always be overwritten. The `version` property in the JSON file will not affect this, even if it is lower than the existing dashboard.
 >
 >
 > If a provisioned dashboard is saved from the UI and the source is removed, the dashboard stored in the database will be deleted unless the configuration option `disableDeletion` is set to true.
 > If a provisioned dashboard is saved from the UI and the source is removed, the dashboard stored in the database will be deleted unless the configuration option `disableDeletion` is set to true.
@@ -415,6 +415,7 @@ The following sections detail the supported settings for each alert notification
 
 
 | Name |
 | Name |
 | ---- |
 | ---- |
+| singleEmail |
 | addresses |
 | addresses |
 
 
 #### Alert notification `hipchat`
 #### Alert notification `hipchat`
@@ -463,4 +464,3 @@ The following sections detail the supported settings for each alert notification
 | Name |
 | Name |
 | ---- |
 | ---- |
 | url |
 | url |
-

docs/sources/alerting/notifications.md

@@ -71,14 +71,19 @@ external image destination if available or fallback to attaching the image to th
 Be aware that if you use the `local` image storage email servers and clients might not be
 Be aware that if you use the `local` image storage email servers and clients might not be
 able to access the image.
 able to access the image.
 
 
+Setting | Description
+---------- | -----------
+Single email | Send a single email to all recipients. Disabled per default.
+Addresses | Email addresses to recipients. You can enter multiple email addresses using a ";" separator.
+
 ### Slack
 ### Slack
 
 
 {{< imgbox max-width="40%" img="/img/docs/v4/slack_notification.png" caption="Alerting Slack Notification" >}}
 {{< imgbox max-width="40%" img="/img/docs/v4/slack_notification.png" caption="Alerting Slack Notification" >}}
 
 
 To set up Slack, you need to configure an incoming Slack webhook URL. You can follow
 To set up Slack, you need to configure an incoming Slack webhook URL. You can follow
-[their guide](https://api.slack.com/incoming-webhooks) on how to do that. If you want to include screenshots of the 
+[Sending messages using Incoming Webhooks](https://api.slack.com/incoming-webhooks) on how to do that. If you want to include screenshots of the
 firing alerts in the Slack messages you have to configure either the [external image destination](#external-image-store)
 firing alerts in the Slack messages you have to configure either the [external image destination](#external-image-store)
-in Grafana, or a bot integration via Slack Apps. Follow Slack's guide to set up a bot integration and use the token 
+in Grafana or a bot integration via Slack Apps. Follow Slack's guide to set up a bot integration and use the token
 provided (https://api.slack.com/bot-users), which starts with "xoxb".
 provided (https://api.slack.com/bot-users), which starts with "xoxb".
 
 
 Setting | Description
 Setting | Description