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]

crates/bpe/benchmarks/Cargo.toml

@@ -20,7 +20,7 @@ test = true
 [dependencies]
 bpe = { path = "../../bpe", features = ["rand", "tiktoken"] }
 bpe-openai = { path = "../../bpe-openai" }
-criterion = "0.7"
+criterion = "0.8"
 rand = "0.9"
 tiktoken-rs = "0.9"
 tokenizers = { version = "0.22", features = ["http"] }

crates/geo_filters/Cargo.toml

@@ -37,7 +37,7 @@ serde = { version = "1.0", default-features = false, optional = true }
 rand_chacha = { version = "0.9", optional = true }
 
 [dev-dependencies]
-criterion = "0.7"
+criterion = "0.8"
 geo_filters = { path = ".", features = ["evaluation"] }
 rand = "0.9"
 rand_chacha = "0.9"

crates/string-offsets/Cargo.toml

@@ -22,7 +22,7 @@ wasm-bindgen = { version = "0.2", optional = true }
 [dev-dependencies]
 rand = "0.9"
 rand_chacha = "0.9"
-criterion = "0.7"
+criterion = "0.8"
 
 [[bench]]
 name = "performance"