trigger workflow on push to main

Signed-off-by: Arnau Alcázar Lleopart <[email protected]>

.github/workflows/generate-submit-dependencies.yml

@@ -1,6 +1,7 @@
 name: Generate and submit dependency graph for libseqera
 on:
-    pull_request:
+  push:
+    branches: ['master']
 
 permissions:
   contents: write