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>

runtime/Cargo.toml

@@ -38,7 +38,7 @@ solana-vote-program = { path = "../programs/vote_program", version = "0.21.0" }
 sys-info = "0.5.8"
 tempfile = "3.1.0"
 solana-rayon-threadlimit = { path = "../rayon-threadlimit", version = "0.21.0" }
-itertools = "0.8.0"
+itertools = "0.8.1"
 
 [lib]
 crate-type = ["lib"]