build(deps): bump chrono from 0.4.19 to 0.4.20 (#3827)

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.19 to 0.4.20.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/main/CHANGELOG.md)
- [Commits](chronotope/chrono@v0.4.19...v0.4.20)

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

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

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

graph/Cargo.toml

@@ -12,7 +12,7 @@ bigdecimal = { version = "0.1.0", features = ["serde"] }
 bytes = "1.0.1"
 diesel = { version = "1.4.8", features = ["postgres", "serde_json", "numeric", "r2d2", "chrono"] }
 diesel_derives = "1.4"
-chrono = "0.4.19"
+chrono = "0.4.20"
 envconfig = "0.10.0"
 Inflector = "0.11.3"
 isatty = "0.1.9"