chore(deps): update criterion requirement from 0.7 to 0.8

Updates the requirements on [criterion](https://github.com/criterion-rs/criterion.rs) to permit the latest version.
- [Release notes](https://github.com/criterion-rs/criterion.rs/releases)
- [Changelog](https://github.com/criterion-rs/criterion.rs/blob/master/CHANGELOG.md)
- [Commits](criterion-rs/criterion.rs@criterion-plot-v0.7.0...criterion-v0.8.0)

---
updated-dependencies:
- dependency-name: criterion
  dependency-version: 0.8.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

http-cache-tower/Cargo.toml

@@ -36,7 +36,7 @@ url = "2.5"
 tempfile = "3.13.0"
 hyper = { version = "1.6.0", features = ["full"] }
 tower = { version = "0.5.2", features = ["util"] }
-criterion = { version = "0.7", features = ["html_reports"] }
+criterion = { version = "0.8", features = ["html_reports"] }
 
 [[bench]]
 name = "streaming_benchmark"