try fixing github actions again

Author: robbecker-wf

.github/workflows/dart_ci.yml

@@ -15,9 +15,9 @@ jobs:
         sdk: [2.13.4, stable, beta]
     steps:
       - uses: actions/checkout@v2
-      - uses: dart-lang/setup-dart@v0.1
+      - uses: dart-lang/setup-dart@v1
         with:
-          channel: ${{ matrix.sdk }}
+          sdk: ${{ matrix.sdk }}
 
       - name: Print Dart SDK version
         run: dart --version