Fix references to Rom class in comments

src/app/editor/modules/gfx_group_editor.h

@@ -25,7 +25,7 @@ namespace editor {
 
 /**
  * @class GfxGroupEditor
- * @brief Manage graphics group configurations in a ROM.
+ * @brief Manage graphics group configurations in a Rom.
  */
 class GfxGroupEditor : public SharedRom {
  public:

src/app/editor/modules/music_editor.h

@@ -57,7 +57,7 @@ static constexpr absl::string_view kSongNotes[] = {
 
 /**
  * @class MusicEditor
- * @brief A class for editing music data in a ROM.
+ * @brief A class for editing music data in a Rom.
  */
 class MusicEditor : public SharedRom {
  public: