Update nom requirement from 7 to 8 in the dependencies group

Updates the requirements on [nom](https://github.com/rust-bakery/nom) to permit the latest version.

Updates `nom` to 8.0.0
- [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
  dependency-group: dependencies
...

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

concatsql_macro/Cargo.toml

@@ -18,7 +18,7 @@ proc-macro2 = "1.0"
 proc-macro-error = "1.0"
 syn = { version = "2.0", features = ["full", "extra-traits"] }
 quote = "1.0"
-nom = "7"
+nom = "8"
 
 [dev-dependencies]
 concatsql = { version = "0.5", path = "../concatsql" }