Make javadoc <p> style guide compliant

This led to confusion for an open source contributor about how to format
code. We don't want to be like, "do as I say, not as I do."

https://google.github.io/styleguide/javaguide.html#s7.1.2-javadoc-paragraphs
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=122589700

java/google/registry/model/contact/ContactPhoneNumber.java

@@ -20,10 +20,10 @@ import google.registry.model.eppcommon.PhoneNumber;
 
 /**
  * EPP Contact Phone Number
- * <p>
- * This class is embedded inside a {@link ContactResource} hold the phone number of an EPP contact.
- * The fields are all defined in the parent class {@link PhoneNumber}, but the subclass is still
- * necessary to pick up the contact namespace.
+ *
+ * <p>This class is embedded inside a {@link ContactResource} hold the phone number of an EPP
+ * contact.  The fields are all defined in the parent class {@link PhoneNumber}, but the subclass is
+ * still necessary to pick up the contact namespace.
  *
  * @see ContactResource
  */