chore(deps): bump rustls-webpki in /demo-iota/rust

Bumps [rustls-webpki](https://github.com/rustls/webpki) from 0.100.1 to 0.100.2.
- [Release notes](https://github.com/rustls/webpki/releases)
- [Commits](rustls/webpki@v/0.100.1...v/0.100.2)

---
updated-dependencies:
- dependency-name: rustls-webpki
  dependency-type: indirect
...

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