Update Rust crate heck to 0.5 (#5263)

Co-authored-by: oxide-renovate[bot] <146848827+oxide-renovate[bot]@users.noreply.github.com>

Author: oxide-renovate[bot]

Cargo.lock

@@ -233,7 +233,7 @@ gethostname = "0.4.3"
 glob = "0.3.1"
 guppy = "0.17.5"
 headers = "0.3.9"
-heck = "0.4"
+heck = "0.5"
 hex = "0.4.3"
 hex-literal = "0.4.1"
 highway = "1.1.0"