Trigger a rebuild of the desktop app on builds to master for the frontend

.drone.yml

@@ -122,6 +122,23 @@ steps:
       target: /frontend/
     depends_on: [ static ]
 
+---
+kind: pipeline
+name: trigger-desktop-update
+
+depends_on:
+  - release-latest
+
+steps:
+  - name: trigger
+    image: plugins/downstream
+    settings:
+      server: https://drone.kolaente.de
+      token:
+        from_secret: drone_token
+      repositories:
+        - vikunja/desktop@master
+
 ---
 kind: pipeline
 type: docker