Update Forbidden artists.mdx (New Artists + New Clauses)

Added two new artists (mikiterP, Rickythegermanboi).
Added line about adding as custom artists for auxiliary credits of forbidden artists.
Added line about list removal if someone on the AI-gen list makes non-AI songs.

Author: CatgirlFrostmoon

src/content/docs/Forbidden artists.mdx

@@ -15,6 +15,7 @@ tags:
 ---
 
 This page contains list of artists whose entries are not allowed to be created on VocaDB.
+Please use custom artists if any of these people are attached to a song in an auxiliary manner (i.e. as an illustrator).
 
 For **existing** artist entries, see the [content removal guidelines](/docs/content-removal-guidelines).
 
@@ -33,14 +34,22 @@ For **existing** artist entries, see the [content removal guidelines](/docs/cont
 - オーロラP (AuroraP / äURORA)
   - https://www.nicovideo.jp/user/140264001
   - https://www.nicovideo.jp/user/140182876
-- 海绵宝宝小芊儿 (impersonated r-906 on BiliBili)
+- 海绵宝宝小芊儿 [impersonated r-906 on BiliBili]
   - https://space.bilibili.com/3690990458112738
   - https://space.bilibili.com/3632306977769957
   - https://space.bilibili.com/3546714015271649
+- Rickythegermanboi
+  - ~~https://scratch.mit.edu/users/rickythegermanboi/~~
+  - https://www.youtube.com/channel/UCg0GtXu1pjjsIkl46SnCUZw
+  - https://scratch.mit.edu/studios/36711110/activity [song list]
+- mikiterP (5MIKI5, mikiter7)
+  - https://www.nicovideo.jp/user/32491293
+  - https://www.youtube.com/channel/UCLtIihd3bh0cgXiZPKeWn-A
+  - https://www.nicolog.jp/user/31959290 [for reference]
 
 ## Artists who exclusively use [AI tools](https://vocadb.net/T/10766/ai-generated-music) to generate songs (e.g. [Suno AI](https://vocadb.net/T/10648/suno))
 
-Songs exclusively made with these technologies are [not allowed on VocaDB](https://wiki.vocadb.net/rules/no-ai-generated-songs).
+Songs exclusively made with these technologies are [not allowed on VocaDB](https://wiki.vocadb.net/rules/no-ai-generated-songs). If an artist on this list has non-AI generated songs, they may be added to VocaDB and removed from the list.
 
 - [Niach](https://www.youtube.com/@Niach-music-) (Niach-Nia)
 - [伊藤光](https://vocadb.net/Ar/147506) (Tomo Aki)