feat: change default group on home screen

src/screens/Home.tsx

@@ -19,7 +19,7 @@ export function Home() {
   const [isLoading, setIsLoading] = useState(true);
   const [exercises, setExercises] = useState<ExerciseDTO[]>([]);
   const [groups, setGroups] = useState<string[]>([]);
-  const [selectedGroup, setSelectedGroup] = useState('costas');
+  const [selectedGroup, setSelectedGroup] = useState('antebraço');
   const toast = useToast();
 
   const navigation = useNavigation<AppNavigatorRoutesProps>();