JBang and JRuby - no args provided (JRuby is stuck)

If I run JRuby with a single arg `--version` then it works fine.

```bash
$ jbang run@jruby --version
jruby 10.0.0.1 (3.4.2) 2025-05-07 79cf1e4aec OpenJDK 64-Bit Server VM 21.0.7+6-LTS on 21.0.7+6-LTS +indy +jit [x86_64-mswin32]
```

However, if I run JRuby without any args it just stares at me. seemingly does nothing, and does not terminate either.

```bash
$ jbang run@jruby 
```