Update tutorial-java-spring-cosmosdb.md

Update the version of the azure-webapp-maven-plugin

Author: Elvira-sxr

articles/app-service/containers/tutorial-java-spring-cosmosdb.md

@@ -184,7 +184,7 @@ Open the `pom.xml` file in the `initial/spring-boot-todo` directory and add the
     <plugin>
         <groupId>com.microsoft.azure</groupId>
         <artifactId>azure-webapp-maven-plugin</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0</version>
         <configuration>
             <schemaVersion>v2</schemaVersion>