Bump bollard from 0.19.4 to 0.21.0

Bumps [bollard](https://github.com/fussybeaver/bollard) from 0.19.4 to 0.21.0.
- [Release notes](https://github.com/fussybeaver/bollard/releases)
- [Changelog](https://github.com/fussybeaver/bollard/blob/master/RELEASE.md)
- [Commits](fussybeaver/bollard@v0.19.4...v0.21.0)

---
updated-dependencies:
- dependency-name: bollard
  dependency-version: 0.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -31,7 +31,7 @@ arrow-flight = { workspace = true }
 arrow-json = { workspace = true }
 arrow-schema = { workspace = true }
 async-trait = "0.1"
-bollard = "=0.19.4"
+bollard = "=0.21.0"
 chrono = "0.4.44"
 clickhouse = "0.15"
 datafusion = { workspace = true, default-features = false, features = ["sql"] }