Bump itertools from 0.8.0 to 0.8.1 (#6583)

Bumps [itertools](https://github.com/bluss/rust-itertools) from 0.8.0 to 0.8.1.
- [Release notes](https://github.com/bluss/rust-itertools/releases)
- [Commits](https://github.com/bluss/rust-itertools/commits)

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

core/Cargo.toml

@@ -27,7 +27,7 @@ crc = { version = "1.9.0", optional = true }
 crossbeam-channel = "0.3"
 fs_extra = "1.1.0"
 indexmap = "1.1"
-itertools = "0.8.0"
+itertools = "0.8.1"
 jsonrpc-core = "14.0.3"
 jsonrpc-derive = "14.0.3"
 jsonrpc-http-server = "14.0.1"