chore: revert codecov-action to v3

Author: pi0

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
       - run: pnpm build
       - run: pnpm test:types
       - run: pnpm vitest --coverage && rm -rf coverage/tmp
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v3
       - name: nightly release
         if: |
           github.event_name == 'push' &&