Bump walkdir from 2.3.1 to 2.3.2 in /fog/ledger/enclave/trusted

Bumps [walkdir](https://github.com/BurntSushi/walkdir) from 2.3.1 to 2.3.2.
- [Release notes](https://github.com/BurntSushi/walkdir/releases)
- [Commits](BurntSushi/walkdir@2.3.1...2.3.2)

---
updated-dependencies:
- dependency-name: walkdir
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>