Bump cpp_demangle from 0.3.4 to 0.3.5 in /src/agent (#1507)

Bumps [cpp_demangle](https://github.com/gimli-rs/cpp_demangle) from 0.3.4 to 0.3.5.
- [Release notes](https://github.com/gimli-rs/cpp_demangle/releases)
- [Changelog](https://github.com/gimli-rs/cpp_demangle/blob/master/CHANGELOG.md)
- [Commits](gimli-rs/cpp_demangle@0.3.4...0.3.5)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Marc Greisen <marc@greisen.org>