docs: update cookbook video bvid to BV1EgEP6oExY (#110)

Replace the embedded Bilibili video in all three cookbook variants
(EN, zh-Hans, and base docs) with the new tutorial video.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: JusterZhu

website/docs/quickstart/Beginner cookbook.md

@@ -12,7 +12,7 @@ title: 入门实战手册
 :::
 
 <iframe
-  src="//player.bilibili.com/player.html?bvid=BV12P9dBiEEh&page=1"
+  src="//player.bilibili.com/player.html?bvid=BV1EgEP6oExY&page=1"
   width="100%"
   height="480"
   style={{ borderRadius: '8px', border: 'none' }}

website/i18n/en/docusaurus-plugin-content-docs/current/quickstart/Beginner cookbook.md

@@ -12,7 +12,7 @@ After completing this cookbook, you'll have a **working end-to-end auto-update s
 :::
 
 <iframe
-  src="//player.bilibili.com/player.html?bvid=BV12P9dBiEEh&page=1"
+  src="//player.bilibili.com/player.html?bvid=BV1EgEP6oExY&page=1"
   width="100%"
   height="480"
   style={{ borderRadius: '8px', border: 'none' }}

website/i18n/zh-Hans/docusaurus-plugin-content-docs/current/quickstart/Beginner cookbook.md

@@ -12,7 +12,7 @@ title: 入门实战手册
 :::
 
 <iframe
-  src="//player.bilibili.com/player.html?bvid=BV12P9dBiEEh&page=1"
+  src="//player.bilibili.com/player.html?bvid=BV1EgEP6oExY&page=1"
   width="100%"
   height="480"
   style={{ borderRadius: '8px', border: 'none' }}