m4: use workspace version for clap

Author: kellpossible

m4/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-clap = { version = "4", features = ["cargo"] }
+clap.workspace = true
 env_logger = "0.11"
 errno = "0.3"
 libc.workspace = true