Temporary display quality badge on develop.

index.html

@@ -141,8 +141,8 @@ layout: home_orekit
     </p>
     <p>We do our best to provide you with a quality code:</p>
     <p>
-      <a href="https://sonar.orekit.org/dashboard?branch=master&id=orekit%3Aorekit">
-        <img alt="quality gate status" src="https://sonar.orekit.org/api/project_badges/measure?branch=master&project=orekit%3Aorekit&metric=alert_status"/>
+      <a href="https://sonar.orekit.org/dashboard?branch=develop&id=orekit%3Aorekit">
+        <img alt="quality gate status" src="https://sonar.orekit.org/api/project_badges/measure?branch=develop&project=orekit%3Aorekit&metric=alert_status"/>
       </a>
       <a href="https://sonar.orekit.org/component_measures?branch=master&id=orekit%3Aorekit&metric=Coverage">
         <img alt="code coverage status" src="https://sonar.orekit.org/api/project_badges/measure?branch=master&project=orekit%3Aorekit&metric=coverage"/>