Use 2.462.1 and 2.471 as Jenkins versions (jenkinsci#1664)

* Use 2.462.1 as lts profile, not 2.452.3

jenkins-infra/release#561 is the 2.462.1 release checklist

* Use 2.471 as the base Jenkins version, not 2.470

Jenkins 2.471 is available now with security fixes

https://www.jenkins.io/changelog/2.471/

https://www.jenkins.io/security/advisory/2024-08-07/ is the advisory

pom.xml

@@ -30,7 +30,7 @@
   <properties>
     <changelist>999999-SNAPSHOT</changelist>
     <spotbugs.skip>true</spotbugs.skip>
-    <jenkins.version>2.470</jenkins.version>
+    <jenkins.version>2.471</jenkins.version>
     <selenium.version>4.23.0</selenium.version>
     <guava.version>33.2.1-jre</guava.version> <!-- aligned with selenium -->
     <maven.version>3.8.1</maven.version>
@@ -751,7 +751,7 @@ and
     <profile>
       <id>lts</id>
       <properties>
-        <jenkins.version>2.452.3</jenkins.version>
+        <jenkins.version>2.462.1</jenkins.version>
       </properties>
     </profile>
   </profiles>