Add tooltip to absorption panel

It's quite hard to read the text on this panel, so I added a tooltip.

runelite-client/src/main/java/net/runelite/client/plugins/nightmarezone/AbsorptionCounter.java

@@ -72,4 +72,10 @@ public class AbsorptionCounter extends Counter
 			return belowThresholdColor;
 		}
 	}
+	
+	@Override
+	public String getTooltip()
+	{
+		return "Absorption: " + absorption;
+	}
 }