Bump org.jenkins-ci.tools:maven-hpi-plugin from 3.50 to 3.51 (#492)

pom.xml

@@ -91,7 +91,7 @@
     <buildnumber-maven-plugin.version>3.2.0</buildnumber-maven-plugin.version>
     <exec-maven-plugin.version>3.1.0</exec-maven-plugin.version>
     <hamcrest.version>2.2</hamcrest.version>
-    <hpi-plugin.version>3.50</hpi-plugin.version>
+    <hpi-plugin.version>3.51</hpi-plugin.version>
     <incrementals-enforce-minimum.version>1.0-beta-4</incrementals-enforce-minimum.version>
     <incrementals-plugin.version>1.7</incrementals-plugin.version>
     <junit.version>5.10.0</junit.version>