docs(calendar): add homeassistant support (#423)

Author: Meierschlumpf

docs/widgets/calendar/index.mdx

@@ -14,6 +14,7 @@ import TabItem from '@theme/TabItem';
 import { calendarWidget } from '.';
 import { lidarrIntegration } from '@site/docs/integrations/lidarr';
 import { nextcloudIntegration } from '@site/docs/integrations/nextcloud';
+import { homeAssistantIntegration } from '@site/docs/integrations/home-assistant';
 import { radarrIntegration } from '@site/docs/integrations/radarr';
 import { readarrIntegration } from '@site/docs/integrations/readarr';
 import { sonarrIntegration } from '@site/docs/integrations/sonarr';
@@ -56,6 +57,8 @@ import withoutIntegrations from './img/without-integrations.png';
   integration: sonarrIntegration,
 }, {
   integration: icalIntegration
+}, {
+  integration: homeAssistantIntegration
 }]} />
 
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