added a noise to low warning!

diff --git a/PSBT_LowSomething.lua b/PSBT_LowSomething.lua
index 9a26824..da92fbb 100644
--- a/PSBT_LowSomething.lua
+++ b/PSBT_LowSomething.lua
@@ -61,6 +61,7 @@ function PSBT_LowSomething:OnPowerUpdate( unit, powerPoolIndex, powerType, power
         string = 'Mount Stamina Low! (|c0CF2B9' .. powerPool .. '|r)'
     end

+    PlaySound( 'Quest_StepFailed' )
     self:NewEvent( PSBT_AREAS.STATIC, true, nil, string )
 end