Use correct value for partition_values argument in drop_stats sample

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Description

Correct the sample call for drop_stats

The table example.web.page_views has a composed partition key, reason why we need ARRAY[ARRAY[varchar, varchar]] type for partition_values parameter in the drop_stats call.

trino/docs/src/main/sphinx/connector/hive.rst

Lines 682 to 694 in e1114ff

	CREATE TABLE example.web.page_views (
	view_time TIMESTAMP,
	user_id BIGINT,
	page_url VARCHAR,
	ds DATE,
	country VARCHAR
	)
	WITH (
	format = 'ORC',
	partitioned_by = ARRAY['ds', 'country'],
	bucketed_by = ARRAY['user_id'],
	bucket_count = 50
	)

Additional context and related issues

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# Section
* Fix some things. ({issue}`issuenumber`)