build(deps): bump undici from 5.28.4 to 5.28.5 in /tools/subgraph-example (#3420)

build(deps): bump undici in /tools/subgraph-example

Bumps [undici](https://github.com/nodejs/undici) from 5.28.4 to 5.28.5.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.28.4...v5.28.5)

---
updated-dependencies:
- dependency-name: undici
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]