Make style of maps of Corsica and Sardinia more consistent

See #1.

sources.csv

@@ -333,7 +333,7 @@ ug-map-colombia.png,https://commons.wikimedia.org/wiki/File:Colombia_in_its_regi
 ug-map-comoros.png,https://commons.wikimedia.org/wiki/File:Comoros_in_its_region.svg,CC BY-SA 3.0,
 ug-map-cook_islands.png,https://commons.wikimedia.org/wiki/File:Cook_Islands_in_its_region.svg,CC BY-SA 3.0,
 ug-map-coral_sea.jpg,?,,
-ug-map-corsica.jpg,?,,
+ug-map-corsica.png,https://commons.wikimedia.org/wiki/File:Corsica_in_its_region.svg,CC BY-SA 3.0,
 ug-map-costa_rica.png,https://commons.wikimedia.org/wiki/File:Costa_Rica_in_its_region.svg,CC BY-SA 3.0,
 ug-map-croatia.png,https://commons.wikimedia.org/wiki/File:Croatia_in_its_region.svg,CC BY-SA 3.0,
 ug-map-cuba.png,https://commons.wikimedia.org/wiki/File:Cuba_in_its_region.svg,CC BY-SA 3.0,
@@ -508,7 +508,7 @@ ug-map-saint_vincent_and_the_grenadines.png,https://commons.wikimedia.org/wiki/F
 ug-map-samoa.png,https://commons.wikimedia.org/wiki/File:Samoa_in_its_region.svg,CC BY-SA 3.0,
 ug-map-san_marino.png,https://commons.wikimedia.org/wiki/File:San_Marino_in_its_region.svg,CC BY-SA 3.0,
 ug-map-sao_tome_and_principe.png,https://commons.wikimedia.org/wiki/File:Sao_Tome_and_Principe_in_its_region.svg,CC BY-SA 3.0,
-ug-map-sardinia.jpg,?,,
+ug-map-sardinia.png,https://commons.wikimedia.org/wiki/File:Sardinia_in_its_region.svg,CC BY-SA 3.0,
 ug-map-saudi_arabia.png,https://commons.wikimedia.org/wiki/File:Saudi_Arabia_in_its_region.svg,CC BY-SA 3.0,
 ug-map-scandinavia.jpg,https://commons.wikimedia.org/wiki/File:Scandinavia_location_map_definitions.PNG,CC BY-SA 3.0,cropped
 ug-map-scotland.png,https://commons.wikimedia.org/wiki/File:Scotland_in_Europe.svg,CC BY-SA 4.0,

src/data.csv

@@ -255,11 +255,11 @@ q@4oQPt%lt,Abkhazia,Abchasien,"Independent state claimed by Georgia.","Unabhäng
 c!s:Fj2c:e,Artsakh,"Republik Arzach","Independent state claimed by Azerbaijan, formerly known as Nagorno-Karabakh.","Unabhängiger Staat, von Aserbaidschan beansprucht und früher bekannt als Republik Bergkarabach.",Stepanakert,Stepanakert,,,,,"<img src=""ug-flag-artsakh.svg"" />",,,"<img src=""ug-map-artsakh.png"" />","UG::Asia UG::Sovereign_State"
 aFoG$7c-N0,Tonga,Tonga,,,Nuku'alofa,Nuku'alofa,,,,,"<img src=""ug-flag-tonga.svg"" />",,,"<img src=""ug-map-tonga.png"" />","UG::Oceania UG::Sovereign_State"
 r;-09<YGl$,Transnistria,Transnistrien,"Independent state claimed by Moldova.","Unabhängiger Staat, von Republik Moldau (Moldawien) beansprucht.",Tiraspol,Tiraspol,,,,,"<img src=""ug-flag-transnistria.svg"" />",,,"<img src=""ug-map-transnistria.png"" />","UG::Europe UG::Sovereign_State"
-h/)!YCH&na,Sardinia,Sardinien,"Autonomous region of Italy.","Autonome Region Italiens.",Cagliari,Cagliari,,,,,"<img src=""ug-flag-sardinia.svg"" />",,,"<img src=""ug-map-sardinia.jpg"" />",UG::Europe
+h/)!YCH&na,Sardinia,Sardinien,"Autonomous region of Italy.","Autonome Region Italiens.",Cagliari,Cagliari,,,,,"<img src=""ug-flag-sardinia.svg"" />",,,"<img src=""ug-map-sardinia.png"" />",UG::Europe
 b&sLa#a&vn,"Kaliningrad Oblast","Oblast Kaliningrad","State (oblast) of the Russian Federation.","Oblast der Russischen Föderation.",Kaliningrad,Kaliningrad,,,,,"<img src=""ug-flag-kaliningrad_oblast.svg"" />",,,"<img src=""ug-map-kaliningrad_oblast.jpg"" />",UG::Europe
 sxF2<dV=;U,Martinique,Martinique,"Overseas department of France.","Übersee-Département Frankreichs.",Fort-de-France,Fort-de-France,,,,,,,,"<img src=""ug-map-martinique.png"" />","UG::America UG::Caribbean"
 e(0+:Olb[9,Java,Java,"Island of Indonesia.","Insel von Indonesien.",,,,,,,,,,"<img src=""ug-map-java.png"" />",UG::Asia
-2N$NqX&k.,Corsica,Korsika,"Region of France.","Gebietskörperschaft Frankreichs.",,Ajaccio,,,,,"<img src=""ug-flag-corsica.svg"" />",,,"<img src=""ug-map-corsica.jpg"" />",UG::Europe
+2N$NqX&k.,Corsica,Korsika,"Region of France.","Gebietskörperschaft Frankreichs.",,Ajaccio,,,,,"<img src=""ug-flag-corsica.svg"" />",,,"<img src=""ug-map-corsica.png"" />",UG::Europe
 z47ZI4{%6m,"European Union","Europäische Union",,,,,,,,,"<img src=""ug-flag-european_union.svg"" />",,,"<img src=""ug-map-european_union.png"" />",UG::Europe
 H=>r?{J3T>,"Gulf of Mexico","Golf von Mexiko",,,,,,,,,,,,"<img src=""ug-map-gulf_of_mexico.jpg"" />",UG::Oceans+Seas
 EvBBgdOH>L,"Philippine Sea",Philippinensee,,,,,,,,,,,,"<img src=""ug-map-philippine_sea.jpg"" />",UG::Oceans+Seas