v0.4.4

• added custom document creation from hit to ElasticsearchRetrievalChain
• added custom index creation to WriteDocumentsToElasticsearchIndexChain

<dependency>
    <groupId>com.github.hakenadu</groupId>
    <artifactId>java-langchains</artifactId>
    <version>0.4.4</version>
</dependency>