Update pycmap_match_cruise_track_datasets.rst

[MSchatzUW]

Megan's comments and edits

[MSchatzUW]

Removed comments below:

“Here, we colocalize two open-ocean North-Pacific transect cruises ('KOK1606' [gradient1], 'MGL1704' [gradient2]) with 14 variables from satellite datasets, model outputs, underway cruise measurements, and World-Ocean-Atlas climatology dataset. A full list of variables can be retrieved using the get_catalog() command . "

..COMMENT: Make get_catalog() a hyperlink in the above paragraph.

SQL EXAMPLE

..COMMENT: I might have commented on this before so it may be a repeat! The SQL example does not look like example 1 or 2 above so I would explain what results this example will give you.