skillcalc: round bonus xp to nearest tenth

XP cannot be more precise than a 10th of an xp. This was compute more precise xp values and when applied over many actions caused the computed actions to be incorrect

runelite-client/src/main/java/net/runelite/client/plugins/skillcalculator/SkillCalculator.java

@@ -343,7 +343,9 @@ class SkillCalculator extends JPanel
 			int actionCount = 0;
 			int neededXP = targetXP - currentXP;
 			SkillAction action = slot.getAction();
-			double xp = (action.isIgnoreBonus()) ? action.getXp() : action.getXp() * xpFactor;
+			float xp = action.isIgnoreBonus()
+				? action.getXp()
+				: Math.round(action.getXp() * xpFactor * 10f) / 10f;
 
 			if (neededXP > 0)
 			{