Update spawn.luau

Fixed args being different for linux and macOs for sleep test

tests/process/spawn.luau

@@ -106,13 +106,11 @@ assert(homeDir1 == homeDir2, "Home dirs did not match when performing tilde subs
 	than a single sleep but also less than 1.5 sleeps
 ]]
 
--- We need to account for the time it takes to spawn a process for Windows
+-- We need to account for the time it takes to spawn a process, because of Windows
 local commandExecutionTolarance = 0 do
-	if isWindows then
-		local commandExecutionStart = os.clock()
-		process.spawn("sleep", {"0"}, if isWindows then { shell = true } else nil)
-		commandExecutionTolarance = os.clock() - commandExecutionStart
-	end
+	local commandExecutionStart = os.clock()
+	process.spawn("sleep", {"0"}, if isWindows then { shell = true } else nil)
+	commandExecutionTolarance = os.clock() - commandExecutionStart
 end
 
 local SLEEP_DURATION = 1 / 4
@@ -129,11 +127,14 @@ local sleepCounter = 0
 for i = 1, SLEEP_SAMPLES, 1 do
 	task.spawn(function()
 		-- Windows does not have a sleep command, so we use shell instead.
-		process.spawn("sleep", {
-			-- Sleep command on Windows in Seconds has some weird behavior with decimals.
-			if isWindows then "-Milliseconds" else nil::any,
+		local args = {
 			tostring(SLEEP_DURATION * (isWindows and 1000 or 1))
-		}, if isWindows then { shell = true } else nil)
+		};
+		if isWindows then
+			-- Sleep command on Windows in Seconds has some weird behavior with decimals.
+			table.insert(args, 1, "-Milliseconds");
+		end
+		process.spawn("sleep", args, if isWindows then { shell = true } else nil)
 		sleepCounter += 1
 	end)
 end