Use cygpath on windows

Author: PEZ

.github/workflows/build-and-test.yml

@@ -149,9 +149,15 @@ jobs:
           bb: latest
 
       - name: Run Tests
+        if: runner.os == 'Linux'
         uses: coactions/setup-xvfb@6b00cf1889f4e1d5a48635647013c0508128ee1a
         with:
-          run: bb run-e2e-tests-vsix ${{ env.VSIX_NAME }}
+          run: bb run-e2e-tests-vsix "$VSIX_NAME"
+
+      - name: Run Tests Windows
+        if: runner.os == 'Windows'
+        shell: bash
+        run: bb run-e2e-tests-vsix $(cygpath -w "$VSIX_NAME")
 
   lint:
     runs-on: ubuntu-latest