fix cli arg help

Author: magiclen

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "xcompress"
-version = "0.12.3"
+version = "0.12.4"
 authors = ["Magic Len <[email protected]>"]
 edition = "2021"
 rust-version = "1.70"

src/cli.rs

@@ -211,7 +211,7 @@ pub struct ExecutablePaths {
     #[arg(help = "Specify the path of your unlzma executable binary file")]
     pub unlzma_path: String,
 
-    #[arg(name = "7z-path")]
+    #[arg(name = "7z-path", value_name = "7Z_PATH")]
     #[arg(long)]
     #[arg(global = true)]
     #[arg(default_value = DEFAULT_7Z_PATH)]