chore(deps): update rust crate which to ~4.3

Author: renovate[bot]

utils/Cargo.toml

@@ -7,6 +7,6 @@ edition = "2018"
 [dependencies]
 rayon = "~1.5"
 tempfile = "~3.3"
-which = "~4.2"
+which = "~4.3"
 log = "~0.4"
 env_logger = "~0.9"