Bump smoltcp-nal from f9e5aa3 to 5a65544

Bumps [smoltcp-nal](https://github.com/quartiq/smoltcp-nal) from `f9e5aa3` to `5a65544`.
- [Release notes](https://github.com/quartiq/smoltcp-nal/releases)
- [Commits](quartiq/smoltcp-nal@f9e5aa3...5a65544)

---
updated-dependencies:
- dependency-name: smoltcp-nal
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>