chore(deps): bump petgraph from 0.7.1 to 0.8.1

Bumps [petgraph](https://github.com/petgraph/petgraph) from 0.7.1 to 0.8.1.
- [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@v0.7.1...petgraph@v0.8.1)

---
updated-dependencies:
- dependency-name: petgraph
  dependency-version: 0.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -51,7 +51,7 @@ indexmap = { workspace = true }
 itertools = { workspace = true, features = ["use_std"] }
 log = { workspace = true }
 paste = "^1.0"
-petgraph = "0.7.1"
+petgraph = "0.8.1"
 
 [dev-dependencies]
 arrow = { workspace = true, features = ["test_utils"] }