Update bom-2.479.x base version

Amends #4231

Should have been updated when 2.492.x line was added

Author: MarkEWaite

sample-plugin/pom.xml

@@ -1532,7 +1532,7 @@
       <id>2.479.x</id>
       <properties>
         <bom>2.479.x</bom>
-        <jenkins.version>2.479.1</jenkins.version>
+        <jenkins.version>2.479.3</jenkins.version>
       </properties>
     </profile>
     <profile>