ci: work-concurrency 1 for e2e test in case of race condition

.github/workflows/ci.yml

@@ -166,7 +166,7 @@ jobs:
 
       - name: Run e2e test script
         working-directory: ./playground
-        run: pnpm --filter "*${{ matrix.e2e-framework }}*" test:e2e
+        run: pnpm --filter --workspace-concurrency 1 "*${{ matrix.e2e-framework }}*" test:e2e
 
       # FIXME: `--with-tests` folders
       # FIXME: Cypress component testing for projects without Vitest