update workflow file

Author: stm7128

.github/workflows/mozc-ut.yaml

@@ -7,7 +7,7 @@ permissions: read-all
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
-
+jobs:
   build_windows:
     runs-on: windows-latest
     timeout-minutes: 120