remove push triggers

.github/workflows/download-latest.yml

@@ -1,12 +1,8 @@
 name: "Update Determinate Nix binary"
 on:
-    repository_dispatch:
     workflow_dispatch:
     schedule:
         - cron: "00 0,6,12,18 * * *"
-    push:
-      paths:
-        - '.github/workflows/*'
 jobs:
     download-binary:
         runs-on: ubuntu-latest