[wp-trac] [WordPress Trac] #42260: Fix WP_Network_Query return type documentation

[WordPress Trac]

#42260: Fix WP_Network_Query return type documentation
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 Reporter:  flixos90            |      Owner:
     Type:  defect (bug)        |     Status:  new
 Priority:  normal              |  Milestone:  4.9
Component:  Networks and Sites  |    Version:
 Severity:  normal              |   Keywords:  needs-patch
  Focuses:  multisite           |
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 Similar to the changes made in [41912] (for #41789), let's fix the
 documentation for `WP_Network_Query` and `get_networks()` as well.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42260>
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