fix felix typos :)

test/db_tests/player_group_test.dart

@@ -12,7 +12,7 @@ void main() {
   late Player testPlayer2;
   late Player testPlayer3;
   late Player testPlayer4;
-  late Group testgroup;
+  late Group testGroup;
   final fixedDate = DateTime(2025, 19, 11, 00, 11, 23);
   final fakeClock = Clock(() => fixedDate);
 
@@ -30,7 +30,7 @@ void main() {
       testPlayer2 = Player(name: 'Bob');
       testPlayer3 = Player(name: 'Charlie');
       testPlayer4 = Player(name: 'Diana');
-      testgroup = Group(
+      testGroup = Group(
         name: 'Test Group',
         members: [testPlayer1, testPlayer2, testPlayer3],
       );
@@ -45,22 +45,22 @@ void main() {
     /// not nullable
 
     test('Adding a player to a group works correctly', () async {
-      await database.groupDao.addGroup(group: testgroup);
+      await database.groupDao.addGroup(group: testGroup);
       await database.playerDao.addPlayer(player: testPlayer4);
       await database.playerGroupDao.addPlayerToGroup(
-        groupId: testgroup.id,
+        groupId: testGroup.id,
         player: testPlayer4,
       );
 
       var playerAdded = await database.playerGroupDao.isPlayerInGroup(
-        groupId: testgroup.id,
+        groupId: testGroup.id,
         playerId: testPlayer4.id,
       );
 
       expect(playerAdded, true);
 
       playerAdded = await database.playerGroupDao.isPlayerInGroup(
-        groupId: testgroup.id,
+        groupId: testGroup.id,
         playerId: '',
       );
 
@@ -68,35 +68,35 @@ void main() {
     });
 
     test('Removing player from group works correctly', () async {
-      await database.groupDao.addGroup(group: testgroup);
+      await database.groupDao.addGroup(group: testGroup);
 
-      final playerToRemove = testgroup.members[0];
+      final playerToRemove = testGroup.members[0];
 
       final removed = await database.playerGroupDao.removePlayerFromGroup(
         playerId: playerToRemove.id,
-        groupId: testgroup.id,
+        groupId: testGroup.id,
       );
       expect(removed, true);
 
       final result = await database.groupDao.getGroupById(
-        groupId: testgroup.id,
+        groupId: testGroup.id,
       );
-      expect(result.members.length, testgroup.members.length - 1);
+      expect(result.members.length, testGroup.members.length - 1);
 
       final playerExists = result.members.any((p) => p.id == playerToRemove.id);
       expect(playerExists, false);
     });
 
     test('Retrieving players of a group works correctly', () async {
-      await database.groupDao.addGroup(group: testgroup);
+      await database.groupDao.addGroup(group: testGroup);
       final players = await database.playerGroupDao.getPlayersOfGroup(
-        groupId: testgroup.id,
+        groupId: testGroup.id,
       );
 
       for (int i = 0; i < players.length; i++) {
-        expect(players[i].id, testgroup.members[i].id);
-        expect(players[i].name, testgroup.members[i].name);
-        expect(players[i].createdAt, testgroup.members[i].createdAt);
+        expect(players[i].id, testGroup.members[i].id);
+        expect(players[i].name, testGroup.members[i].name);
+        expect(players[i].createdAt, testGroup.members[i].createdAt);
       }
     });
   });