Update dart.yml

Author: hoc081098

.github/workflows/dart.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        sdk: [ 2.12.0, 2.15.0, stable, beta, dev ]
+        sdk: [ beta, stable, 2.15.0, 2.12.0 ]
 
     steps:
       - uses: actions/checkout@v3