clap: Replace deprecated attribute #[clap(...)] with #[command(...)]

Fixes these warnings when running `cargo check --features clap/deprecated`:
warning: use of deprecated function `<Cargo as clap::Subcommand>::augment_subcommands::old_attribute`: Attribute `#[clap(...)]` has been deprecated in favor of `#[command(...)]`
  --> src/main.rs:60:3
   |
60 | #[clap(bin_name = "cargo", subcommand_required = true)]
   |   ^^^^
   |
   = note: `#[warn(deprecated)]` on by default

warning: use of deprecated function `<Opts as clap::Args>::augment_args::old_attribute`: Attribute `#[clap(...)]` has been deprecated in favor of `#[command(...)]`
  --> src/main.rs:66:3
   |
66 | #[clap(
   |   ^^^^

Author: LingMan

src/main.rs

@@ -57,13 +57,13 @@ const REPORT_HEADER: &str = "\
 ==================================================================================";
 
 #[derive(Debug, Parser)]
-#[clap(bin_name = "cargo", subcommand_required = true)]
+#[command(bin_name = "cargo", subcommand_required = true)]
 enum Cargo {
     BisectRustc(Opts),
 }
 
 #[derive(Debug, Parser)]
-#[clap(
+#[command(
     bin_name = "cargo bisect-rustc",
     version,
     about,