Update ocean maps to be similar to the continent ones

Fix anki-geo#264.

sources.csv

@@ -242,12 +242,12 @@ ug-map-antarctica-nobox.png,https://commons.wikimedia.org/wiki/File:Antarctica_i
 ug-map-antigua_and_barbuda.png,https://commons.wikimedia.org/wiki/File:Antigua_and_Barbuda_in_its_region_(zoomed).svg,CC BY-SA 3.0,colours adjusted for consistency
 ug-map-arabian_sea.png,not upstreamed yet,CC BY-SA 3.0,
 ug-map-aral_sea.png,not upstreamed yet,CC BY-SA 3.0,
-ug-map-arctic_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Arctic_Ocean.png,PD,
+ug-map-arctic_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Arctic_Ocean_in_the_world_(blue)_(W3)_(CWF).svg,CC BY-SA 4.0,
 ug-map-argentina.png,https://commons.wikimedia.org/wiki/File:Argentina_in_its_region_(%2Ball_claims_wo_Antarctica_hatched).svg,CC BY-SA 3.0,
 ug-map-armenia.png,https://commons.wikimedia.org/wiki/File:Armenia_in_its_region.svg,CC BY-SA 3.0,
 ug-map-aruba.png,https://commons.wikimedia.org/wiki/File:Aruba_in_its_region_(zoom).svg,CC BY-SA 3.0,colours adjusted for consistency
 ug-map-asia-nobox.png,https://commons.wikimedia.org/wiki/File:Asia_in_the_world_(red)_(W3).svg,CC BY-SA 3.0,
-ug-map-atlantic_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Atlantic_Ocean.png,PD,
+ug-map-atlantic_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Atlantic_Ocean_in_the_world_(blue)_(W3)_(CWF).svg,CC BY-SA 4.0,
 ug-map-australia.png,https://commons.wikimedia.org/wiki/File:Australia_in_its_region.svg,CC BY-SA 3.0,
 ug-map-austria.png,https://commons.wikimedia.org/wiki/File:Austria_in_its_region.svg,CC BY-SA 3.0,
 ug-map-azerbaijan.png,https://commons.wikimedia.org/wiki/File:Azerbaijan_in_its_region_(claimed_hatched).svg,CC BY-SA 3.0,
@@ -356,7 +356,7 @@ ug-map-hudson_bay.png,not upstreamed yet,CC BY-SA 3.0,
 ug-map-hungary.png,https://commons.wikimedia.org/wiki/File:Hungary_in_its_region.svg,CC BY-SA 3.0,
 ug-map-iceland.png,https://commons.wikimedia.org/wiki/File:Iceland_in_its_region.svg,CC BY-SA 3.0,
 ug-map-india.png,https://commons.wikimedia.org/wiki/File:India_in_its_region_(claimed_and_disputed_hatched).svg,CC BY-SA 3.0,
-ug-map-indian_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Indianocean.PNG,PD,version with white background
+ug-map-indian_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Indian_Ocean_in_the_world_(blue)_(W3)_(CWF).svg,CC BY-SA 4.0,
 ug-map-indonesia.png,https://commons.wikimedia.org/wiki/File:Indonesia_in_its_region.svg,CC BY-SA 3.0,
 ug-map-iran.png,https://commons.wikimedia.org/wiki/File:Iran_in_its_region.svg,CC BY-SA 3.0,
 ug-map-iraq.png,https://commons.wikimedia.org/wiki/File:Iraq_in_its_region.svg,CC BY-SA 3.0,
@@ -431,7 +431,7 @@ ug-map-norway.png,https://commons.wikimedia.org/wiki/File:Norway_in_its_region.s
 ug-map-norwegian_sea.png,not upstreamed yet,CC BY-SA 3.0,
 ug-map-oceania-nobox.png,https://commons.wikimedia.org/wiki/File:Oceania_in_the_world_(red)_(W3).svg,CC BY-SA 3.0,
 ug-map-oman.png,https://commons.wikimedia.org/wiki/File:Oman_in_its_region.svg,CC BY-SA 3.0,
-ug-map-pacific_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Pacific_Ocean.png,PD,version with white background and smaller file size
+ug-map-pacific_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Pacific_Ocean_in_the_world_(blue)_(W3_Pacific)_(CWF).svg,CC BY-SA 4.0,
 ug-map-pakistan.png,https://commons.wikimedia.org/wiki/File:Pakistan_in_its_region_(claimed_and_disputed_hatched).svg,CC BY-SA 3.0,
 ug-map-palau.png,https://commons.wikimedia.org/wiki/File:Palau_in_its_region.svg,CC BY-SA 3.0,
 ug-map-palestine.png,https://commons.wikimedia.org/wiki/File:Palestine_in_its_region.svg,CC BY-SA 3.0,
@@ -486,7 +486,7 @@ ug-map-south_china_sea.png,not upstreamed yet,CC BY-SA 3.0,
 ug-map-south_korea.png,https://commons.wikimedia.org/wiki/File:South_Korea_in_its_region.svg,CC BY-SA 3.0,
 ug-map-south_ossetia.png,https://commons.wikimedia.org/wiki/File:South_Ossetia_in_its_region.svg,CC BY-SA 3.0,
 ug-map-south_sudan.png,https://commons.wikimedia.org/wiki/File:South_Sudan_in_its_region_(claimed_hatched).svg,CC BY-SA 3.0,
-ug-map-southern_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Location_Southern_Ocean.svg,CC BY-SA 3.0,
+ug-map-southern_ocean-nobox.png,https://commons.wikimedia.org/wiki/File:Southern_Ocean_in_the_world_(blue)_(W3)_(CWF).svg,CC BY-SA 4.0,
 ug-map-spain.png,https://commons.wikimedia.org/wiki/File:Spain_in_its_region_(mainland).svg,CC BY-SA 3.0,
 ug-map-sri_lanka.png,https://commons.wikimedia.org/wiki/File:Sri_Lanka_in_its_region.svg,CC BY-SA 3.0,
 ug-map-sudan.png,https://commons.wikimedia.org/wiki/File:Sudan_in_its_region_(claimed_hatched).svg,CC BY-SA 3.0,