flag (#850)

## Description:
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fixed flag

https://discord.com/channels/1359946986937258015/1359946989046989063/1375424419455045702
## Please complete the following:

- [ ] 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>

src/client/data/countries.json

@@ -24,7 +24,7 @@
     "name": "Afghanistan"
   },
   {
-    "code": "african union",
+    "code": "African union",
     "continent": "Africa",
     "name": "African Union"
   },