Support JDK 19's Thread/sleep

[frenchy64]

JDK 19 doesn't like this:

(Thread/sleep (rand 100))
;Execution error (IllegalArgumentException) at async-alts.core/eval11621 (form-init13060262411934958877.clj:1).
;No matching method sleep found taking 1 args

There is a new method that Clojure can't disambiguate: https://docs.oracle.com/en/java/javase/19/docs/api/java.base/java/lang/Thread.html#sleep(java.time.Duration)