[backend] Update dependency co.elastic.clients:elasticsearch-java to v9

Author: renovate[bot]

openbas-api/pom.xml

@@ -23,7 +23,7 @@
         <apache-poi.version>5.4.1</apache-poi.version>
         <opentelemetry.version>1.49.0</opentelemetry.version>
         <opentelemetry-semconv.version>1.32.0</opentelemetry-semconv.version>
-        <elasticsearch.version>8.18.1</elasticsearch.version>
+        <elasticsearch.version>9.0.1</elasticsearch.version>
     </properties>
 
     <profiles>

openbas-model/pom.xml

@@ -14,7 +14,7 @@
     <description>OpenBAS model</description>
 
     <properties>
-        <elasticsearch.version>8.18.1</elasticsearch.version>
+        <elasticsearch.version>9.0.1</elasticsearch.version>
     </properties>
 
     <dependencies>