Solved a warning when generating javadoc

pom.xml

@@ -16,6 +16,18 @@
   </description>
 
   <properties>
+
+    
+    <!-- COTS version -->
+    <rugged.orekit.version>9.3-SNAPSHOT</rugged.orekit.version>
+    <rugged.hipparchus.version>1.4</rugged.hipparchus.version>
+    <rugged.junit.version>4.12</rugged.junit.version>
+    
+    <!-- Compilers and Tools version -->
+    <rugged.compiler.source>1.8</rugged.compiler.source>
+    <rugged.compiler.target>1.8</rugged.compiler.target>
+    <rugged.implementation.build>${git.revision}; ${maven.build.timestamp}</rugged.implementation.build>
+
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <rugged.spotbugs-maven-plugin.version>3.1.7</rugged.spotbugs-maven-plugin.version>
@@ -43,13 +55,7 @@
     <rugged.nexus-staging-maven-plugin.version>1.6.8</rugged.nexus-staging-maven-plugin.version>
     <rugged.maven-gpg-plugin.version>1.6</rugged.maven-gpg-plugin.version>
     <rugged.maven-install-plugin.version>3.0.0-M1</rugged.maven-install-plugin.version>
-    <rugged.orekit.version>9.3-SNAPSHOT</rugged.orekit.version>
-    <rugged.hipparchus.version>1.4</rugged.hipparchus.version>
-    <rugged.junit.version>4.12</rugged.junit.version>
-    <rugged.compiler.source>1.8</rugged.compiler.source>
-    <rugged.compiler.target>1.8</rugged.compiler.target>
-    <rugged.implementation.build>${git.revision}; ${maven.build.timestamp}</rugged.implementation.build>
-
+    
   </properties>
 
   <developers>
@@ -493,7 +499,7 @@
         <configuration>
           <bottom><![CDATA[Copyright &copy; ${project.inceptionYear}-{currentYear} <a href="http://www.c-s.fr">CS Syst&egrave;mes d&apos;information</a>. All rights reserved.]]></bottom>
           <links>
-            <link>http://docs.oracle.com/javase/8/docs/api/</link>
+            <link>https://docs.oracle.com/javase/8/docs/api/</link>
             <link>https://www.hipparchus.org/apidocs/</link>
             <link>http://www.orekit.org/site-rugged-${rugged.orekit.version}/apidocs/</link>
           </links>