Reduce nation cheating even more 📊 (#2757)

## Description:

WIth my other new PR "Nations send much better nukes now (Part 1)"
nations got smarter.

Because of that, and based on player feedback, my own tests and youtube
videos (pros like enzo can't beat impossible difficulty nations without
warship infestations) we need to turn down the cheating.

With this PR, I reduced the cheating by 50% (again).

## 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

src/core/configuration/DefaultConfig.ts

@@ -792,9 +792,9 @@ export class DefaultConfig implements Config {
         case Difficulty.Medium:
           return 25_000; // Like humans
         case Difficulty.Hard:
-          return 31_250;
+          return 28_125;
         case Difficulty.Impossible:
-          return 37_500;
+          return 31_250;
         default:
           assertNever(this._gameConfig.difficulty);
       }
@@ -827,9 +827,9 @@ export class DefaultConfig implements Config {
       case Difficulty.Medium:
         return maxTroops * 1; // Like humans
       case Difficulty.Hard:
-        return maxTroops * 1.25;
+        return maxTroops * 1.125;
       case Difficulty.Impossible:
-        return maxTroops * 1.5;
+        return maxTroops * 1.25;
       default:
         assertNever(this._gameConfig.difficulty);
     }
@@ -856,10 +856,10 @@ export class DefaultConfig implements Config {
           toAdd *= 1; // Like humans
           break;
         case Difficulty.Hard:
-          toAdd *= 1.05;
+          toAdd *= 1.025;
           break;
         case Difficulty.Impossible:
-          toAdd *= 1.1;
+          toAdd *= 1.05;
           break;
         default:
           assertNever(this._gameConfig.difficulty);