update pom, add jreleaser version

Author: assadriaz

pom.xml

@@ -14,7 +14,9 @@
     <modules>
         <module>gbfs-validator-java</module>
     </modules>
-
+    <properties>
+        <jreleaser-maven-plugin.version>1.18.0</jreleaser-maven-plugin.version>
+    </properties>
     <build>
         <plugins>
             <plugin>
@@ -70,7 +72,6 @@
 
             <properties>
                 <sonar-maven-plugin.version>3.7.0.1746</sonar-maven-plugin.version>
-                <jreleaser-maven-plugin.version>1.18.0</jreleaser-maven-plugin.version>
             </properties>
 
             <build>