docs лендинг: две ссылки-пустышки от перплексити убраны

Сторож ссылок падал на `[текст](8)` и `[текст](6)` — это номера
сносок из ответа перплексити, а не адреса. Отправка в общий
репозиторий была заблокирована именно ими.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/research/2026-08-06-lending-kak-delaem.md

@@ -62,7 +62,7 @@ The course FAQ indicates the content is for learning; there is no blanket statem
 
 #### Yuri Artiukh (akella) demos
 
-Yuri’s live‑coding demos on YouTube [including the **curl tubes from lusion.co** video](8) are excellent **technical references**. There is at least one GitHub repo that attempts to reproduce lusion’s about page:
+Yuri’s live‑coding demos on YouTube including the **curl tubes from lusion.co** video are excellent **technical references**. There is at least one GitHub repo that attempts to reproduce lusion’s about page:
 
 - **WalkerZyy/Lusion** — “学习 three.js ，并尝试复刻 https://lusion.co/about”\[9]  
   License: The repo currently includes **no explicit LICENSE file**.\[9] That means *default copyright*; you **cannot assume** commercial reuse rights. It’s good as a **learning reference** but not safe for client production unless you rewrite the code.
@@ -92,7 +92,7 @@ While you said single‑file Three.js (not R3F), you can still:
 
 #### TSL (Three.js Shader Language) demos
 
-Three.js’s TSL demos [e.g. shader image transitions](6) live in the official examples under the **Three.js MIT license**, so you can reuse patterns and even code. They are useful for **post‑processing, transitions, and displacement** in a more modern style.
+Three.js’s TSL demos (e.g. shader image transitions) live in the official examples under the **Three.js MIT license**, so you can reuse patterns and even code. They are useful for **post‑processing, transitions, and displacement** in a more modern style.
 
 ### 2. Where the license FORBIDS or is risky for commercial reuse