Add documentation for new services for bosch_alarm (#38368)

source/_integrations/bosch_alarm.markdown

@@ -88,6 +88,32 @@ A switch is added for each output configured on the panel. Note that for some pa
 
 Three switches are added per door, which allow for locking, securing, or momentarily unlocking the door.
 
+## Actions
+
+The integration provides the following actions.
+
+### Action: Set panel date and time
+
+The `bosch_alarm.set_date_time` action is used to update the date and time on the panel.
+
+- **Data attribute**: `config_entry_id`
+  - **Description**: The ID of the config entry of the panel being updated.
+  - **Optional**: No
+
+- **Data attribute**: `datetime`
+  - **Description**: The date and time to set. Defaults to the current date and time if it is not set.
+  - **Optional**: Yes
+
+{% raw %}
+
+```yaml
+# Example: Update the panel’s date and time
+service: bosch_alarm.set_date_time
+data:
+  config_entry_id: "YOUR_CONFIG_ENTRY_ID"
+  datetime: "2025-05-01T12:00:00"
+```
+{% endraw %}
 
 ## Authentication