Update BiliBili video link in case-studies.yml

Author: nikpachoo

data/case-studies/case-studies.yml

@@ -66,7 +66,7 @@ items:
       Message feature.
     isExternal: true
     linkText: Watch the full video
-    link: https://www.bilibili.com/video/BV1es421T71C/
+    link: https://mp.weixin.qq.com/s/yRwkbQxFsRBNZW3Z-S1A8Q
     platforms:
       - android
       - ios
@@ -975,4 +975,4 @@ items:
       - compose-multiplatform
     isExternal: true
     link: https://tech.phonepe.com/pincode-migration-journey-with-compose-multiplatform/
-  #------------------------------------------------------------------------
+  #------------------------------------------------------------------------