Upgrade criterion crate from 0.7 to 0.8 version (#1360)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

benches/Cargo.toml

@@ -9,7 +9,7 @@ publish = false
 juniper = { path = "../juniper" }
 
 [dev-dependencies]
-criterion = "0.7"
+criterion = "0.8"
 tokio = { version = "1.0", features = ["rt-multi-thread"] }
 
 [lints.clippy]