Optimize player count configuration for Surrounded map 🏝️ (openfrontio#2780)

## Description:

Based on Nikola map lead feedback

## 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:

FloPinguin

Author: FloPinguin

src/core/configuration/DefaultConfig.ts

@@ -87,7 +87,7 @@ const numPlayersConfig = {
   [GameMapType.Lemnos]: [20, 15, 10],
   [GameMapType.TwoLakes]: [60, 50, 40],
   [GameMapType.StraitOfHormuz]: [40, 36, 30],
-  [GameMapType.Surrounded]: [56, 28, 14], // 4, 2, 1 players per island
+  [GameMapType.Surrounded]: [42, 28, 14], // 3, 2, 1 player(s) per island
 } as const satisfies Record<GameMapType, [number, number, number]>;
 
 export abstract class DefaultServerConfig implements ServerConfig {