The Javadoc for `IndexOperations#createIndex` is incorrect

[bjansen]

It looks like this Javadoc was copy/pasted from ensureIndex, at the moment it's not clear what happens if the index already exists:

	/**
	 * Create the index for the provided {@link IndexDefinition} exists for the collection indicated by the entity class.
	 * If not it will be created.
	 *
	 * @param indexDefinition must not be {@literal null}.
	 * @return the index name.
	 * @since 4.5
	 */
	default String createIndex(IndexDefinition indexDefinition) {
		return ensureIndex(indexDefinition);
	}