Update plugin parent POM to latest (#303)

pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>4.88</version>
+    <version>5.1</version>
     <relativePath/>
   </parent>
 
@@ -26,10 +26,7 @@
     <changelist>999999-SNAPSHOT</changelist>
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     <apacheds.version>2.0.0.AM25</apacheds.version>
-    <jenkins.version>2.475</jenkins.version>
-    <!-- TODO JENKINS-73339 until in parent POM -->
-    <jenkins-test-harness.version>2265.v3da_49c8134d6</jenkins-test-harness.version>
-    <maven.compiler.release>17</maven.compiler.release>
+    <jenkins.version>2.479</jenkins.version>
   </properties>
 
   <scm>
@@ -310,12 +307,6 @@
         <scope>import</scope>
         <type>pom</type>
       </dependency>
-      <!-- TODO JENKINS-73339 until in parent POM, work around https://github.com/jenkinsci/plugin-pom/issues/936 -->
-      <dependency>
-        <groupId>jakarta.servlet</groupId>
-        <artifactId>jakarta.servlet-api</artifactId>
-        <version>5.0.0</version>
-      </dependency>
     </dependencies>
   </dependencyManagement>