Fix typo in IndicesAdminClient#prepareOpen Javadoc (#107198)

server/src/main/java/org/elasticsearch/client/internal/IndicesAdminClient.java

@@ -247,7 +247,7 @@ public interface IndicesAdminClient extends ElasticsearchClient {
     /**
      * Opens one or more indices based on their index name.
      *
-     * @param indices The name of the indices to close
+     * @param indices The name of the indices to open
      */
     OpenIndexRequestBuilder prepareOpen(String... indices);