build(deps): bump petgraph from 0.8.1 to 0.8.2

Bumps [petgraph](https://github.com/petgraph/petgraph) from 0.8.1 to 0.8.2.
- [Release notes](https://github.com/petgraph/petgraph/releases)
- [Changelog](https://github.com/petgraph/petgraph/blob/master/CHANGELOG.md)
- [Commits](https://github.com/petgraph/petgraph/compare/petgraph@v0.8.1...petgraph@v0.8.2)

---
updated-dependencies:
- dependency-name: petgraph
  dependency-version: 0.8.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -58,7 +58,7 @@ mockall = "0.13.1"
 nix = { version = "0.30.1", default-features = false }
 parking_lot = "0.12.4"
 paste = "1.0.15"
-petgraph = "0.8.1"
+petgraph = "0.8.2"
 pretty_assertions = "1.4.1"
 rand = "0.9.1"
 ratatui = "0.29.0"