Bump chrono from 0.4.8 to 0.4.9 (#5775)

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.8 to 0.4.9.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/master/CHANGELOG.md)
- [Commits](https://github.com/chronotope/chrono/commits/v0.4.9)

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

sdk/Cargo.toml

@@ -37,7 +37,7 @@ bincode = "1.1.4"
 bs58 = "0.2.5"
 byteorder = { version = "1.3.2", optional = true }
 cfg-if = "0.1.9"
-chrono = { version = "0.4.8", features = ["serde"], optional = true }
+chrono = { version = "0.4.9", features = ["serde"], optional = true }
 generic-array = { version = "0.13.2", default-features = false, features = ["serde", "more_lengths"], optional = true }
 hex = "0.3.2"
 itertools = { version = "0.8.0", optional = true }