Also trigger formatting on PR creation

Author: wawanbreton

.github/workflows/lint-formatter.yml

@@ -1,13 +1,17 @@
 name: lint-formatter
 
 on:
-  workflow_dispatch:
-
   push:
     paths:
       - 'include/**/*.h*'
       - 'src/**/*.c*'
 
+  pull_request:
+    types: [ opened ]
+    paths:
+      - 'include/**/*.h*'
+      - 'src/**/*.c*'
+
 jobs:
   lint-formatter-job:
     uses: ultimaker/cura-workflows/.github/workflows/lint-formatter.yml@main