Try to get a bit more info on the Windows test failure

Author: jennybc

.github/workflows/test-windows.yml

@@ -16,6 +16,7 @@ jobs:
     timeout-minutes: 30
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      RUST_BACKTRACE: 1
     steps:
       - uses: actions/checkout@v4