Buil workflow should run on linux

.github/workflows/ci.yaml

@@ -10,7 +10,7 @@ on:
 jobs:
 
   build:
-    runs-on: windows-latest
+    runs-on: ubuntu-latest
     if: github.event.head_commit.author.name != 'actions'
     steps:
     - uses: actions/checkout@v2