restrict action triggers

Signed-off-by: Max Ostapenko <1611259+max-ostapenko@users.noreply.github.com>

Author: max-ostapenko

.github/workflows/infra.yaml

@@ -6,11 +6,6 @@ on:
       - main
     paths:
       - 'infra/**'
-  pull_request:
-    branches:
-      - main
-    paths:
-      - 'infra/**'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}