chore(deps): bump x25519-dalek in the rustcrypto group

Bumps the rustcrypto group with 1 update: [x25519-dalek](https://github.com/dalek-cryptography/curve25519-dalek).


Updates `x25519-dalek` from 3.0.0-pre.3 to 3.0.0-pre.4
- [Release notes](https://github.com/dalek-cryptography/curve25519-dalek/releases)
- [Commits](https://github.com/dalek-cryptography/curve25519-dalek/commits)

---
updated-dependencies:
- dependency-name: x25519-dalek
  dependency-version: 3.0.0-pre.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: rustcrypto
...

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

Author: dependabot[bot]

Cargo.lock

@@ -103,7 +103,7 @@ pkcs8 = { version = "0.11.0-rc.8", default-features = false, features = [
 spki = { version = "0.8.0-rc.4", features = [
   "alloc",
 ], default-features = false, optional = true }
-x25519-dalek = { version = "3.0.0-pre.3", features = [
+x25519-dalek = { version = "3.0.0-pre.4", features = [
   "static_secrets",
   "zeroize",
 ], default-features = false, optional = true }