chore: bump savvy from 0.7.2 to 0.8.0 in /src/rust

Bumps [savvy](https://github.com/yutannihilation/savvy) from 0.7.2 to 0.8.0.
- [Release notes](https://github.com/yutannihilation/savvy/releases)
- [Changelog](https://github.com/yutannihilation/savvy/blob/main/CHANGELOG.md)
- [Commits](yutannihilation/savvy@v0.7.2...v0.8.0)

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

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

src/rust/Cargo.toml

@@ -10,7 +10,7 @@ crate-type = ['staticlib']
 name = "prqlr"
 
 [dependencies]
-savvy = "0.7.2"
+savvy = "0.8.0"
 # prqlc= { version = "0.13.0", default-features = false }
 # prqlc 0.13.0 is not compatible with Rust 1.69.0, so a slightly modified version is installed
 # See https://github.com/PRQL/prql/pull/4916