Replace sleep with uiSleep

see the below links for more info. uiSleep is based off of a more
accurate method of tracking time, whereas sleep can fluctuate depending
on application performance since it is based on framerate.
https://community.bistudio.com/wiki/uiSleep
https://community.bistudio.com/wiki/sleep_vs_uiSleep
https://community.bistudio.com/wiki/sleep

SQF/dayz_code/compile/player_checkStealth.sqf

@@ -45,7 +45,7 @@ if (_anim4 == "aswm") then {
 			player playActionNow "stop";
 		};
 		// This sleep was much needed
-		sleep 5;
+		uiSleep 5;
 
 		dayz_isSwimming = false;
 	};