sink_ndjson() doesn't appear in docs

[etiennebacher]

Description

sink_ndjson() doesn't appear on the docs website, but it was implemented a few weeks ago in #10786.

Link

https://docs.pola.rs/docs/python/dev/search.html?q=ndjson

[cmdlineluser]

I think it just needs to be added here:

polars/py-polars/docs/source/reference/io.rst

Lines 55 to 58 in 67507ff

	read_json
	read_ndjson
	scan_ndjson
	DataFrame.write_json

[etiennebacher]

In addition to this, the function on the Python side is called sink_ndjson() but it is called sink_json() on the Rust side. Also, the example is wrong because it calls .sink_json(). Is this distinction between ndjson and json on purpose?

polars/py-polars/polars/lazyframe/frame.py

Lines 2227 to 2228 in 67507ff

	>>> lf = pl.scan_csv("/path/to/my_larger_than_ram_file.csv") # doctest: +SKIP
	>>> lf.sink_json("out.json") # doctest: +SKIP