Update ci.yml

Author: cristianoc

.github/workflows/ci.yml

@@ -74,7 +74,7 @@ jobs:
 
       - name: Run tests (Windows)
         if: runner.os == 'Windows'
-        run: opam exec -- node scripts/ciTest.js -mocha -theme
+        run: opam exec -- node scripts/ciTest.js -mocha -theme -format
 
       - name: Get artifact info
         id: get_artifact_info