修正: ディレクトリ変更に関わるマージ失敗を修正 (VOICEVOX#1358)

fix: プリセットインポートのマージ失敗を修正

test/benchmark/engine_preparation.py

@@ -10,10 +10,10 @@
 from voicevox_engine.app.application import generate_app
 from voicevox_engine.core.core_initializer import initialize_cores
 from voicevox_engine.engine_manifest import load_manifest
-from voicevox_engine.preset.PresetManager import PresetManager
+from voicevox_engine.preset.preset_manager import PresetManager
 from voicevox_engine.setting.setting_manager import SettingHandler
 from voicevox_engine.tts_pipeline.tts_engine import make_tts_engines_from_cores
-from voicevox_engine.user_dict.user_dict import UserDictionary
+from voicevox_engine.user_dict.user_dict_manager import UserDictionary
 from voicevox_engine.utility.path_utility import engine_manifest_path