Fixed small errors in map jsons (#430)

## Description:

This PR fixed small errors in the jsons of a few map(this includes names
of nations and a wrong flag)

Fixes #475 

## Please complete the following:

- [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:

<Nikola123>

resources/maps/Mena.json

@@ -53,7 +53,7 @@
     },
     {
       "coordinates": [1409, 372],
-      "name": "Palestinian Territory, Occupied",
+      "name": "Palestinian Territory",
       "strength": 1,
       "flag": "ps"
     },
@@ -173,7 +173,7 @@
     },
     {
       "coordinates": [98, 55],
-      "name": "2",
+      "name": "Mauritania",
       "strength": 1,
       "flag": "mr"
     },