Update readme part about waitTask/taskID.
Update readme part about waitTask/taskID.

algolia/algoliasearch-client-java,algoliareadmebot/algoliasearch-client-java,algoliareadmebot/algoliasearch-client-java-2,algoliareadmebot/algoliasearch-client-java-2,algolia/algoliasearch-client-java,algoliareadmebot/algoliasearch-client-java