chore(deps)(deps): bump bollard from 0.20.2 to 0.21.0

Bumps [bollard](https://github.com/fussybeaver/bollard) from 0.20.2 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@v0.20.2...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

@@ -52,7 +52,7 @@ hyper = { version = "1.0", features = ["server", "http1"], optional = true }
 hyper-util = { version = "0.1", features = ["tokio"], optional = true }
 
 # Alternative execution backends
-bollard = { version = "0.20", optional = true }
+bollard = { version = "0.21", optional = true }
 reqwest = { workspace = true, optional = true }
 
 # MCP (Model Context Protocol)

crates/terraphim_rlm/Cargo.toml

@@ -71,7 +71,7 @@ term_size = "0.3"
  dirs = "5.0"
 
 # Docker and container support
-bollard = { version = "0.20", optional = true }
+bollard = { version = "0.21", optional = true }
 ahash = "0.8.12"
 axum-test = "19.1.1"