Update esp-idf-v4.3-build.yml

.github/workflows/esp-idf-v4.3-build.yml

@@ -1,13 +1,12 @@
 # This is a basic workflow to help you get started with Actions
 name: ESP-IDF v4.3.1
-
+on:
   push:
     branches: 
       - '**4.3'
   pull_request:
     branches:
       - '**4.3'
-
 jobs:
   job1:
     name: Build Number