Update Rust crate heck to 0.5.0

Author: renovate[bot]

xtask/Cargo.toml

@@ -8,7 +8,7 @@ publish = false
 [dependencies]
 anyhow = "1.0.40"
 flate2 = "1.0.20"
-heck = "0.3.2"
+heck = "0.5.0"
 proc-macro2 = "1.0.27"
 quote = "1.0.9"
 serde = { version = "1.0.126", features = ["derive"] }