Use HTTPS in Maven dev connection

To avoid key exchange in GHA.

(cherry picked from commit bcf93a8)

Author: acogoluegnes

pom.xml

@@ -41,7 +41,7 @@
   <scm>
     <url>https://github.com/rabbitmq/rabbitmq-java-client</url>
     <connection>scm:git:git://github.com/rabbitmq/rabbitmq-java-client.git</connection>
-    <developerConnection>scm:git:git@github.com:rabbitmq/rabbitmq-java-client.git</developerConnection>
+    <developerConnection>scm:git:https://github.com/rabbitmq/rabbitmq-java-client.git</developerConnection>
     <tag>HEAD</tag>
   </scm>