Add downstream build trigger

.drone.yml

@@ -35,3 +35,26 @@ steps:
     when:
       event: [ push ]
       branch: [ main ]
+---
+kind: pipeline
+name: trigger-website-update
+
+trigger:
+  branch:
+    - main
+  event:
+    - push
+
+depends_on:
+  - build
+
+steps:
+  - name: trigger
+    image: plugins/downstream
+    settings:
+      server: https://drone.kolaente.de
+      token:
+        from_secret: drone_token
+      repositories:
+        - vikunja/website@main
+        - vikunja/blog@main