Update nom requirement from 7.0 to 8.0

Updates the requirements on [nom](https://github.com/rust-bakery/nom) to permit the latest version.
- [Changelog](https://github.com/rust-bakery/nom/blob/main/CHANGELOG.md)
- [Commits](rust-bakery/nom@7.0.0...8.0.0)

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

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

Author: dependabot[bot]

Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-nom = "7.0"
+nom = "8.0"
 av-data = "0.3"
 av-format = "0.5.0"