Fix Zimbabwe typo (#595)

## Description:

## Please complete the following:

- [ ] I have added screenshots for all UI updates
- [ ] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [ ] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
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## Please put your Discord username so you can be contacted if a bug or
regression is found:

prajaybasu

resources/maps/Africa.json

@@ -119,7 +119,7 @@
     },
     {
       "coordinates": [1423, 1646],
-      "name": "Zimbabwa",
+      "name": "Zimbabwe",
       "strength": 2,
       "flag": "zw"
     },