Update governor requirement from 0.7.0 to 0.8.0

Updates the requirements on [governor](https://github.com/boinkor-net/governor) to permit the latest version.
- [Release notes](https://github.com/boinkor-net/governor/releases)
- [Changelog](https://github.com/boinkor-net/governor/blob/master/release.toml)
- [Commits](boinkor-net/governor@v0.7.0...v0.8.0)

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

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

Cargo.toml

@@ -30,7 +30,7 @@ serde = { version = "1.0.199", features = ["derive"] }
 ecow = { version = "0.2.2", features = ["serde"] }
 thiserror = { version = "2.0.6" }
 maybe-async = { version = "0.2.10" }
-governor = "0.7.0"
+governor = "0.8.0"
 rand = "0.8.5"
 serde_json = "1.0.120"