Updated Notify_discord (markdown)

Notify_discord.md

@@ -20,6 +20,12 @@ The last part of the URL you're given make up the 2 tokens you need to send noti
 1. **WebhookID** is ```4174216298```
 2. **WebhookToken** is ```JHMHI8qBe7bk2ZwO5U711o3dV_js```
 
+### Pinging Roles, Tags, and Users
+The discord message body can contain content such as the following to trigger the appropriate pings
+-  **user**: `<@123>`
+-  **role**: `<@&456>`
+-  **tag**: `@everyone`
+
 ### Syntax
 Valid syntax is as follows:
 * `https://discordapp.com/api/webhooks/{WebhookID}/{WebhookToken}`
@@ -60,3 +66,10 @@ If you want to have your own custom avatar URL you're already hosting from anoth
 apprise -vv -t "Test Message Title" -b "Test Message Body" \
    "discord://4174216298/JHMHI8qBe7bk2ZwO5U711o3dV_js?avatar_url=https://i.imgur.com/FsEpmwg.jpeg"
 ```
+Send a notification that notifies `@everyone` in the channel:
+```bash
+# Assuming our {WebhookID} is 4174216298
+# Assuming our {WebhookToken} is JHMHI8qBe7bk2ZwO5U711o3dV_js
+apprise -vv -t "Hello All" -b "Test Message that pings @everyone" \
+   "discord://4174216298/JHMHI8qBe7bk2ZwO5U711o3dV_js"
+```