LLLL pattern does not work (stand alone month)

Describe the bug LLLL pattern does not work as intended. Instead, it uses the MMMM pattern.

To Reproduce Add the following test in main of custom tests:

test('stand alone month is correct', () {
  final dateFormat = DateFormat.LLLL('el_GR');
  final date = DateTime.now().copyWith(month: 7);
  final formattedDate = dateFormat.format(date);
  expect(formattedDate, equals('Ιούλιος'));
});

The expected value in the test provided is based on the stand alone month values of the locale.

System info

Dart SDK 3.0.5
Flutter SDK 3.10.5
intl 0.19.0-dev

dependencies:
- clock 1.1.1
- meta 1.9.1
- path 1.8.3

dev dependencies:
- benchmark_harness 2.2.2
- ffi 1.2.1
- fixnum 1.1.0
- js 0.6.7 [meta]
- lints 2.1.1
- test 1.24.4 [analyzer async boolean_selector collection coverage http_multi_server io js matcher node_preamble package_config path pool shelf shelf_packages_handler shelf_static shelf_web_socket source_span stack_trace stream_channel test_api test_core typed_data web_socket_channel webkit_inspection_protocol yaml]

transitive dependencies:
- _fe_analyzer_shared 62.0.0 [dart_internal meta]
- analyzer 6.0.0 [_fe_analyzer_shared collection convert crypto glob meta package_config path pub_semver source_span watcher yaml]
- args 2.4.2
- async 2.11.0 [collection meta]
- boolean_selector 2.1.1 [source_span string_scanner]
- collection 1.17.2
- convert 3.1.1 [typed_data]
- coverage 1.6.3 [args logging package_config path source_maps stack_trace vm_service]
- crypto 3.0.3 [typed_data]
- dart_internal 0.2.8
- file 7.0.0 [meta path]
- frontend_server_client 3.2.0 [async path]
- glob 2.1.2 [async collection file path string_scanner]
- http_multi_server 3.2.1 [async]
- http_parser 4.0.2 [collection source_span string_scanner typed_data]
- io 1.0.4 [meta path string_scanner]
- logging 1.2.0
- matcher 0.12.16 [async meta stack_trace term_glyph test_api]
- mime 1.0.4
- node_preamble 2.0.2
- package_config 2.1.0 [path]
- pool 1.5.1 [async stack_trace]
- pub_semver 2.1.4 [collection meta]
- shelf 1.4.1 [async collection http_parser path stack_trace stream_channel]
- shelf_packages_handler 3.0.2 [path shelf shelf_static]
- shelf_static 1.1.2 [convert http_parser mime path shelf]
- shelf_web_socket 1.0.4 [shelf stream_channel web_socket_channel]
- source_map_stack_trace 2.1.1 [path source_maps stack_trace]
- source_maps 0.10.12 [source_span]
- source_span 1.10.0 [collection path term_glyph]
- stack_trace 1.11.0 [path]
- stream_channel 2.1.2 [async]
- string_scanner 1.2.0 [source_span]
- term_glyph 1.2.1
- test_api 0.6.1 [async boolean_selector collection meta source_span stack_trace stream_channel string_scanner term_glyph]
- test_core 0.5.4 [analyzer args async boolean_selector collection coverage frontend_server_client glob io meta package_config path pool source_map_stack_trace source_maps source_span stack_trace stream_channel test_api vm_service yaml]
- typed_data 1.3.2 [collection]
- vm_service 11.7.2
- watcher 1.1.0 [async path]
- web_socket_channel 2.4.0 [async crypto stream_channel]
- webkit_inspection_protocol 1.2.0 [logging]
- yaml 3.1.2 [collection source_span string_scanner]

dart-lang / i18n

LLLL pattern does not work (stand alone month) #675