Summary: Stepik adds AI generation link

Why It Matters: This change shows Stepik is looking into new ways to make courses.

What Changed:

• A link to "AI generation" was added.
• The "Распродажа «Выйти из IT»" (Sale "Exit IT") section was removed.
• A new section called "Учим английский язык" (Learning English) was added.
• The number of courses for "C/C++" changed from 45 to 43.
• The number of "решений" (solutions) increased from 1,564,258,006 to 1,571,551,741.
• The version number changed from 424.0.2830 to 426.0.2931.
• Some course details in the "В тренде" (Trending) section were updated or removed.