Resolve "Allow more attemps"

Closes #4 (closed)

lib/widgets/letters.dart

@@ -59,7 +59,7 @@ class LetterButtons extends StatelessWidget {
                       }
                     } else {
                       _myProvider.addError();
-                      if (_myProvider.errors == 6) {
+                      if (_myProvider.errors == 8) {
                         if (_myProvider.soundValue == true) {
                           await sound.play(Archive.error.file);
                           await Future.delayed(Duration(seconds: 1));