avoid timing race in async test

This is the test from #27164.

The test was checking whether sleep(1) (which is started first) or
sleep(0.05) (which is nominally shorter) returned first. Switch the
order so that the short sleep should always end first.

Fixes #46360

test/misc.jl

@@ -241,8 +241,8 @@ do_something_async_27164() = @async(begin sleep(1); x27164[] = 2; end)
 
 let t = nothing
     @sync begin
-        t = do_something_async_27164()
         @async (sleep(0.05); x27164[] = 1)
+        t = do_something_async_27164()
     end
     @test x27164[] == 1
     fetch(t)