fix: Added cfg in help_template

src/builder/debug_asserts.rs

@@ -359,6 +359,13 @@ pub(crate) fn assert_app(cmd: &Command) {
             cmd.get_name(),
             "`{unified}` template variable was removed in clap3, use `{options}` instead"
         );
+        #[cfg(feature = "unstable-v5")]
+        assert!(
+            !help_template.to_string().contains("{bin}"),
+            "Command {}: {}",
+            cmd.get_name(),
+            "`{bin}` template variable was removed in clap5, use `{name}` instead"
+        )
     }
 
     cmd._panic_on_missing_help(cmd.is_help_expected_set());