chores: Add 霰餅 to the forbidden artist list

Author: FinnRG

src/content/docs/Forbidden artists.mdx

@@ -42,6 +42,8 @@ For **existing** artist entries, see the [content removal guidelines](/docs/cont
   - [YouTube](https://www.youtube.com/channel/UCO7fBxwYcmgVNHZZsV4dDoA)
   - [SoundCloud](https://soundcloud.com/neil-marie)
   - [Spotify](https://open.spotify.com/artist/0vcTLbke2ddStNaNwlmZCU)
+- 霰餅
+  - [Bilibili](https://space.bilibili.com/3546653650848686)
 
 ## Accounts/channels containing uploads that are confirmed stolen