checkout@v1 -> checkout@v4

Author: simphotonics

.github/workflows/dart.yml

@@ -15,15 +15,15 @@ on:
     branches: [ main ]
     paths:
     - '**.dart'
-    
+
   workflow_dispatch:
 
 jobs:
   build:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       # Note: This workflow uses the latest stable version of the Dart SDK.
       # You can specify other versions if desired, see documentation here: