Try cmd directly

Author: liufengyun

.github/workflows/ci.yaml

@@ -105,9 +105,8 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Test
-        uses: liufengyun/actions@v1
-        with:
-          command: sbt ";compile ;test"
+        run: sbt ";compile ;test"
+        shell: cmd
 
   test_bootstrapped-windows:
     runs-on: [self-hosted, Windows]
@@ -117,9 +116,8 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Test
-        uses: liufengyun/actions@v1
-        with:
-          command: sbt ";dotty-bootstrapped/compile ;dotty-bootstrapped/test"
+        run: sbt ";dotty-bootstrapped/compile ;dotty-bootstrapped/test"
+        shell: cmd
 
       # - name: Scala.js Test
       #   uses: liufengyun/actions@v1