Proposal : Update Series Koukyoushihen Eureka Seven japanese name

Proposal details

This proposal will make the following change(s):

Update the japanese name of the series Koukyoushihen Eureka Seven

Change the japanese name from Unknown to 交響詩篇エウレカセブン

Based on the following reason: Missing

With the source: https://myanimelist.net/anime/237/Koukyoushihen_Eureka_Seven