Summary: Stepik adds "Black Friday" course discounts

Why It Matters: This shows Stepik is running a big sale. Sales can bring in many new users.

What Changed:

• Stepik added a new section called "Чёрная пятница: курсы со скидками" (Black Friday: courses with discounts).
• This new section replaced the "Онлайн-курсы" (Online courses) section that listed "В тренде" (Trending), "Новые курсы" (New courses), etc.
• The new section highlights courses with discounts in categories like "Анализ данных и Data Science" (Data Analysis and Data Science), "ИИ на каждый день" (AI for everyday), "Английский язык" (English language), "ЕГЭ и ОГЭ" (Unified State Exam and Basic State Exam), and "Хобби и досуг" (Hobbies and leisure).
• Stepik added a new section called "Вместе дешевле" (Cheaper together) with bundled course offers and programs.
• Stepik added a new section called "Black Friday на Stepik" with discounted courses in categories like Python, Software Testing, Engineering, DevOps Tools, and Excel and Google Sheets.
• The number of "решений" (solutions) increased from 1,595,295,368 to 1,602,517,060.
• The version number changed from 428.0.3049 to 430.0.3109.
• Some course counts in the "Бизнес, менеджмент, финансы" (Business, management, finance) and "Творчество, дизайн и Soft Skills" (Creativity, design and Soft Skills) sections changed slightly.
• Some author follower counts and course counts changed slightly.