build(deps): bump der from 0.7.8 to 0.7.9

Bumps [der](https://github.com/RustCrypto/formats) from 0.7.8 to 0.7.9.
- [Commits](https://github.com/RustCrypto/formats/compare/der/v0.7.8...der/v0.7.9)

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

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

Cargo.lock

@@ -1473,9 +1473,9 @@ dependencies = [
 
 [[package]]
 name = "der"
-version = "0.7.8"
+version = "0.7.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fffa369a668c8af7dbf8b5e56c9f744fbd399949ed171606040001947de40b1c"
+checksum = "f55bf8e7b65898637379c1b74eb1551107c8294ed26d855ceb9fd1a09cfc9bc0"
 dependencies = [
  "const-oid",
  "pem-rfc7468",

crates/keystore/Cargo.toml

@@ -14,7 +14,7 @@ workspace = true
 [dependencies]
 aead = { version = "0.5.2", features = ["std"] }
 const-oid = { version = "0.9.6", features = ["std"] }
-der = { version = "0.7.8", features = ["std"] }
+der = { version = "0.7.9", features = ["std"] }
 ecdsa = { version = "0.16.9", features = ["std"] }
 elliptic-curve = { version = "0.13.8", features = ["std", "pem", "sec1"] }
 k256 = { version = "0.13.3", features = ["std"] }