Update directory_writer.yml

Author: izefoea

.github/workflows/directory_writer.yml

@@ -1,11 +1,10 @@
 # The objective of this GitHub Action is to update the DIRECTORY.md file (if needed)
 # when doing a git push
 name: directory_writer
-on:
-  pull_request
+on: push
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     steps:
       - uses: actions/checkout@v4
         with: