Bump curve25519-dalek in the cargo group across 1 directory

Bumps the cargo group with 1 update in the / directory: [curve25519-dalek](https://github.com/dalek-cryptography/curve25519-dalek).


Updates `curve25519-dalek` from 4.1.1 to 4.1.3
- [Release notes](https://github.com/dalek-cryptography/curve25519-dalek/releases)
- [Commits](dalek-cryptography/curve25519-dalek@curve25519-4.1.1...curve25519-4.1.3)

---
updated-dependencies:
- dependency-name: curve25519-dalek
  dependency-type: direct:production
  dependency-group: cargo
...

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