Normalize Javadoc paragraph tags "p" (lower case)

src/main/java/org/apache/commons/lang3/builder/HashCodeBuilder.java

@@ -366,7 +366,7 @@ public class HashCodeBuilder implements Builder<Integer> {
      * also not as efficient as testing explicitly.
      * </p>
      *
-     * <P>
+     * <p>
      * If the TestTransients parameter is set to {@code true}, transient members will be tested, otherwise they
      * are ignored, as they are likely derived fields, and not part of the value of the {@link Object}.
      * </p>

src/main/java/org/apache/commons/lang3/builder/StandardToStringStyle.java

@@ -463,7 +463,7 @@ public class StandardToStringStyle extends ToStringStyle {
      * Gets the start text to output when an {@link Object} is
      * output in summary mode.
      *
-     * <P>This is output before the size value.</p>
+     * <p>This is output before the size value.</p>
      *
      * @return the current start of summary text
      */