chore(deps): update rust crate handlebars to v4

Author: renovate[bot]

Cargo.lock

@@ -45,7 +45,7 @@ git2-curl = "0.19.0"
 gix = { version = "0.55.2", default-features = false, features = ["blocking-http-transport-curl", "progress-tree", "revision"] }
 gix-features-for-configuration-only = { version = "0.35.0", package = "gix-features", features = [ "parallel" ] }
 glob = "0.3.1"
-handlebars = { version = "3.5.5", features = ["dir_source"] }
+handlebars = { version = "4.5.0", features = ["dir_source"] }
 hex = "0.4.3"
 hmac = "0.12.1"
 home = "0.5.5"