New license request: bilibili Model Use License Agreement (Bilibili-IndexTTS)

**License Name**
bilibili Model Use License Agreement

**License Homepage URL**
I could only find it at https://github.com/index-tts/index-tts/blob/main/LICENSE for now.

**Reference URLs**
Discovered through https://github.com/index-tts/index-tts

**Notes**
They currently use LicenseRef-Bilibili-IndexTTS inside their own package metadata.