Use most recent plugin BOM release - 6166.va_a_8b_5eda_8ef5

Rely on most recent dependencies because those are the versions that
I use in my testing.  Older versions of dependencies might work, but I
test with most recent releases.

Author: MarkEWaite

pom.xml

@@ -54,7 +54,7 @@
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
         <artifactId>bom-${jenkins.baseline}.x</artifactId>
-        <version>5983.v443959746f1f</version>
+        <version>6166.va_a_8b_5eda_8ef5</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>