maven: Use https for jenkins repo, to fix build with newer maven (#5039)

Maven 3.8.1 blocks non-secure repo connections per default.

Author: rp-

pom.xml

@@ -742,14 +742,14 @@
     <repositories>
         <repository>
             <id>repo.jenkins-ci.org.releases</id>
-            <url>http://repo.jenkins-ci.org/releases/</url>
+            <url>https://repo.jenkins-ci.org/releases/</url>
             <snapshots>
                 <enabled>false</enabled>
             </snapshots>
         </repository>
         <repository>
             <id>repo.jenkins-ci.org.public</id>
-            <url>http://repo.jenkins-ci.org/public/</url>
+            <url>https://repo.jenkins-ci.org/public/</url>
         </repository>
     </repositories>