Add read_shapefile to python io docs #2067

Job	Run time
build-benchmarks	2m 38s
check-features	23s
Lint and Test	7m 33s
check-features (-F csv)	30s
check-features-with-external-dependencies (-F gdal -F gdal/bindgen)	55s
check-features (-F flatgeobuf)	26s
check-features-with-external-dependencies (-F geos)	27s
check-features (-F flatgeobuf_async)	41s
check-features-with-external-dependencies (-F proj)	54s
check-features (-F ipc_compression)	24s
check-features (-F parquet)	21s
check-features (-F parquet_async)	36s
check-features (-F parquet_compression)	22s
check-features (-F polylabel)	17s
check-features (-F postgis)	1m 0s
check-features (-F rayon)	30s
	17m 57s

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