Bump parent pom from 6.2.0 to 6.7.0

In order to validate the plugin with Jetty 12, we need to get jenkinsci/plugin-pom#693 which is included in `4.62` version. That bump occurred on the `analysis-pom` version `6.7.0`.

pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.jvnet.hudson.plugins</groupId>
     <artifactId>analysis-pom</artifactId>
-    <version>6.2.0</version>
+    <version>6.7.0</version>
     <relativePath />
   </parent>