ci: update rolldown overrides

Author: hi-ogawa

.github/workflows/ci-rsc.yml

@@ -58,7 +58,7 @@ jobs:
       - name: install rolldown
         if: ${{ matrix.rolldown }}
         run: |
-          echo 'overrides: { vite: "npm:rolldown-vite@latest" }' >> pnpm-workspace.yaml
+          sed -i '/^overrides:/a\  vite: "npm:rolldown-vite@latest"' pnpm-workspace.yaml
           pnpm i --no-frozen-lockfile
       - run: pnpm -C packages/plugin-rsc exec playwright install ${{ matrix.browser }}
       - run: pnpm -C packages/plugin-rsc test-e2e-ci --project=${{ matrix.browser }}