Fix map jsons (#960)

## Description:
Quite a bit of maps have problems with their jsons. In this PR, I'll try
to fix some of them.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

<DISCORD USERNAME>
Nikola123

resources/maps/SouthAmerica.json

@@ -1,7 +1,7 @@
 {
   "name": "Americas",
   "width": 1746,
-  "height": 2380,
+  "height": 2378,
   "nations": [
     {
       "coordinates": [438, 58],
@@ -94,7 +94,7 @@
       "flag": "gf"
     },
     {
-      "coordinates": [801, 242],
+      "coordinates": [800, 410],
       "name": "Guyana",
       "strength": 1,
       "flag": "gy"