fix(figterm): Replace deprecated cargo_bin with cargo_bin! macro

Replace the deprecated CommandCargoExt::cargo_bin method with the
recommended cargo_bin! macro to resolve compilation warnings.

🤖 Assisted by Amazon Q Developer

Author: dk19y

crates/figterm/tests/cli.rs

@@ -5,7 +5,7 @@ use predicates::prelude::*;
 
 #[test]
 fn version_flag_has_status_code_zero() {
-    let mut cmd = Command::cargo_bin("figterm").unwrap();
+    let mut cmd = Command::new(assert_cmd::cargo::cargo_bin!("figterm"));
     cmd.arg("--version");
 
     cmd.assert()