docs(cli): Clarify '-' behavior

Fixes #1271

crates/typos-cli/src/bin/typos-cli/args.rs

@@ -30,7 +30,7 @@ impl Format {
 #[command(about, author, version)]
 #[command(group = clap::ArgGroup::new("mode").multiple(false))]
 pub(crate) struct Args {
-    /// Paths to check with `-` for stdin
+    /// Paths to check (`-` to check stdin)
     #[arg(default_value = ".", group = "source")]
     pub(crate) path: Vec<std::path::PathBuf>,
 

crates/typos-cli/tests/cmd/help.toml

@@ -6,7 +6,7 @@ Source Code Spelling Correction
 Usage: typos[EXE] [OPTIONS] [PATH]...
 
 Arguments:
-  [PATH]...  Paths to check with `-` for stdin [default: .]
+  [PATH]...  Paths to check (`-` to check stdin) [default: .]
 
 Options:
       --file-list <FILE_LIST>  Read the list of newline separated paths from file or stdin (if `-`)