Update rgb(argslist) usage (#7425)

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## About The Pull Request
Fix OD0013 error 'rgb takes 3 to 5 arguments'
May technically be an OpenDream compiler error as this presumably does
work as is. But Lohikar suggested a better solution for modern byond and
we like better solutions.

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## Why It's Good For The Game
Cleans up 1 line of dirty code.
OD compatibility++
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🆑
fix: Fix a bad use of rgb()
/🆑

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code/modules/admin/admin_modal/modals/admin_narrate.dm

@@ -54,7 +54,7 @@
 	if(!.)
 		return
 	set_target(target)
-	src.narrate_visual_color = rgb(arglist(hsl2rgb(rand(0, 360), rand(0, 360), rand(125, 360))))
+	src.narrate_visual_color = rgb(rand(0, 360), rand(0, 360), rand(125, 360), space = COLORSPACE_HSL)
 
 	var/list/possible_modes = resolve_modes()
 	if(length(possible_modes))