add reload events for Mqtt and Template (#19505)

source/_docs/configuration/events.markdown

@@ -55,8 +55,6 @@ This event has no additional data.
 
 Event `scene_reloaded` is fired when scenes have been reloaded and thus might have changed.
 
-This event has no additional data.
-
 ## Event `platform_discovered`
 
 Event `platform_discovered` is fired when a new platform has been discovered by the [`discovery`](/integrations/discovery/) component.

source/_integrations/mqtt.markdown

@@ -64,3 +64,9 @@ mqtt:
 - [Birth and last will messages](/docs/mqtt/birth_will/)
 - [Testing your setup](/docs/mqtt/testing/)
 - [Logging](/docs/mqtt/logging/)
+
+## Event `event_mqtt_reloaded`
+
+Event `event_mqtt_reloaded` is fired when Manually configured MQTT entities have been reloaded and entities thus might have changed.
+
+This event has no additional data.

source/_integrations/template.markdown

@@ -709,3 +709,9 @@ sensor:
         type: device_class
         default: None
 {% endconfiguration %}
+
+## Event `event_template_reloaded`
+
+Event `event_template_reloaded` is fired when Template entities have been reloaded and entities thus might have changed.
+
+This event has no additional data.