[doc] ShortVariable now also reports short enum constant names

Refs #3123

docs/pages/release_notes.md

@@ -246,6 +246,7 @@ Contributors: [Lucas Soncini](https://github.com/lsoncini) (@lsoncini),
 * {% rule java/codestyle/MethodNamingConventions %}: The property `checkNativeMethods` has been removed. The
   property was deprecated since PMD 6.3.0. Use the property `nativePattern` to control whether native methods
   should be considered or not.
+* {% rule java/codestyle/ShortVariable %}: This rule now also reports short enum constant names.
 * {% rule java/codestyle/UseDiamondOperator %}: The property `java7Compatibility` has been removed. The rule now
   handles Java 7 properly without a property.
 * {% rule java/codestyle/UnnecessaryFullyQualifiedName %}: The rule has two new properties,

docs/pages/release_notes_pmd7.md

@@ -581,6 +581,7 @@ Related issue: [[core] Explicitly name all language versions (#4120)](https://gi
 * {% rule java/codestyle/MethodNamingConventions %}: The property `checkNativeMethods` has been removed. The
   property was deprecated since PMD 6.3.0. Use the property `nativePattern` to control whether native methods
   should be considered or not.
+* {% rule java/codestyle/ShortVariable %}: This rule now also reports short enum constant names.
 * {% rule java/codestyle/UseDiamondOperator %}: The property `java7Compatibility` has been removed. The rule now
   handles Java 7 properly without a property.
 * {% rule java/codestyle/UnnecessaryFullyQualifiedName %}: The rule has two new properties,

pmd-java/src/main/resources/category/java/codestyle.xml

@@ -1392,7 +1392,7 @@ public class ShortMethod {
           class="net.sourceforge.pmd.lang.rule.XPathRule"
           externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_codestyle.html#shortvariable">
         <description>
-Fields, local variables, or parameter names that are very short are not helpful to the reader.
+Fields, local variables, enum constant names or parameter names that are very short are not helpful to the reader.
         </description>
         <priority>3</priority>
         <properties>