[commons-numbers-core] use non-deprecated ref in docs
The code was already changed but refer to the non-deprecated version in
documentaton as well.
@@ -435,7 +435,7 @@ public final class Precision {
/**
* Rounds the given value to the specified number of decimal places.
- * The value is rounded using the {@link BigDecimal#ROUND_HALF_UP} method.
+ * The value is rounded using the {@link RoundingMode#HALF_UP} method.
*
* @param x Value to round.
* @param scale Number of digits to the right of the decimal point.
