Bump parity-db from 0.3.5 to 0.3.8 (paritytech#10970)

Bumps [parity-db](https://github.com/paritytech/parity-db) from 0.3.5 to 0.3.8.
- [Release notes](https://github.com/paritytech/parity-db/releases)
- [Commits](https://github.com/paritytech/parity-db/commits/v0.3.8)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

client/db/Cargo.toml

@@ -33,7 +33,7 @@ sc-state-db = { version = "0.10.0-dev", path = "../state-db" }
 sp-trie = { version = "6.0.0", path = "../../primitives/trie" }
 sp-blockchain = { version = "4.0.0-dev", path = "../../primitives/blockchain" }
 sp-database = { version = "4.0.0-dev", path = "../../primitives/database" }
-parity-db = { version = "0.3.5", optional = true }
+parity-db = { version = "0.3.8", optional = true }
 
 [dev-dependencies]
 sp-tracing = { version = "5.0.0", path = "../../primitives/tracing" }