chore: bump curve25519-dalek from 3.2.0 to 3.2.1 (#23517)

Bumps [curve25519-dalek](https://github.com/dalek-cryptography/curve25519-dalek) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/dalek-cryptography/curve25519-dalek/releases)
- [Changelog](https://github.com/dalek-cryptography/curve25519-dalek/blob/main/CHANGELOG.md)
- [Commits](https://github.com/dalek-cryptography/curve25519-dalek/compare/3.2.0...3.2.1)

---
updated-dependencies:
- dependency-name: curve25519-dalek
  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>

sdk/program/Cargo.toml

@@ -37,7 +37,7 @@ thiserror = "1.0"
 [target.'cfg(not(target_arch = "bpf"))'.dependencies]
 bitflags = "1.3.1"
 base64 = "0.13"
-curve25519-dalek = "3.0.0"
+curve25519-dalek = "3.2.1"
 libsecp256k1 = "0.6.0"
 rand = "0.7.0"
 itertools = "0.10.1"