chore(deps): update portgraph requirement from 0.8 to 0.9

Updates the requirements on [portgraph](https://github.com/CQCL/portgraph) to permit the latest version.
- [Changelog](https://github.com/CQCL/portgraph/blob/main/CHANGELOG.md)
- [Commits](https://github.com/CQCL/portgraph/commits)

---
updated-dependencies:
- dependency-name: portgraph
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -70,6 +70,6 @@ members = ["pyrs", "compile-matcher"]
 [workspace.dependencies]
 
 quantinuum-hugr = { git = "https://github.com/CQCL-DEV/hugr", rev = "5a97a635" }
-portgraph = { version = "0.8", features = ["serde"] }
+portgraph = { version = "0.9", features = ["serde"] }
 pyo3 = { version = "0.19" }
 itertools = { version = "0.11.0" }