Fix the jetty ignore rule

Jetty does not use SemVer style (10.0.0-alpha-1),
but rather an additional dot (10.0.0.alpha1).

Author: ctrueden

rules.xml

@@ -44,7 +44,7 @@
     </rule>
     <rule groupId="org.eclipse.jetty" artifactId="*" comparisonMethod="maven">
       <ignoreVersions>
-        <ignoreVersion type="regex">.*-(alpha|beta|rc)-?[0-9]+</ignoreVersion>
+        <ignoreVersion type="regex">.*[-\.](alpha|beta|rc)-?[0-9]+</ignoreVersion>
         <ignoreVersion type="regex">.*\.RC[0-9]+</ignoreVersion>
       </ignoreVersions>
     </rule>