Standarize map names across info and manifest jsons (#4011)

## Description:

Just a text change. 4 maps had inconsistencies in their names in their
info.json (and by consequence the manifest). If sites extracted map
names from one of these they would appear with an inconsistent name. The
south america map for example was named "Americas", and appeared as such
in the pathfinding playground (thats where i noticed these
inconsistencies)

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

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

tri.star1011

map-generator/assets/maps/bajacalifornia/info.json

@@ -1,5 +1,5 @@
 {
-  "name": "bajacalifornia",
+  "name": "Baja California",
   "nations": [
     {
       "coordinates": [513, 44],

map-generator/assets/maps/greatlakes/info.json

@@ -1,5 +1,5 @@
 {
-  "name": "greatlakes",
+  "name": "Great Lakes",
   "nations": [
     {
       "coordinates": [38, 326],

map-generator/assets/maps/milkyway/info.json

@@ -1,5 +1,5 @@
 {
-  "name": "milkyway",
+  "name": "Milky Way",
   "nations": [
     {
       "coordinates": [775, 757],

map-generator/assets/maps/southamerica/info.json

@@ -1,5 +1,5 @@
 {
-  "name": "Americas",
+  "name": "South America",
   "nations": [
     {
       "coordinates": [438, 58],

resources/maps/bajacalifornia/manifest.json

@@ -14,7 +14,7 @@
     "num_land_tiles": 331582,
     "width": 900
   },
-  "name": "bajacalifornia",
+  "name": "Baja California",
   "nations": [
     {
       "coordinates": [513, 44],

resources/maps/greatlakes/manifest.json

@@ -14,7 +14,7 @@
     "num_land_tiles": 476275,
     "width": 1000
   },
-  "name": "greatlakes",
+  "name": "Great Lakes",
   "nations": [
     {
       "coordinates": [38, 326],

resources/maps/milkyway/manifest.json

@@ -14,7 +14,7 @@
     "num_land_tiles": 105978,
     "width": 750
   },
-  "name": "milkyway",
+  "name": "Milky Way",
   "nations": [
     {
       "coordinates": [775, 757],

resources/maps/southamerica/manifest.json

@@ -14,7 +14,7 @@
     "num_land_tiles": 342275,
     "width": 872
   },
-  "name": "Americas",
+  "name": "South America",
   "nations": [
     {
       "coordinates": [438, 58],