v0.2.5 - Corrected instruct language guidance (verified)

Patch Release

Corrects the v0.2.4 language guidance for FireRedTTS3-Instruct cloning after direct verification. v0.2.4 claimed instruct cloning inherits the reference audio's language - further testing proved that wrong for non-ZH/EN:

• Greek reference + Greek text -> degenerate output (""Thank you.""). Same-language reference does not rescue instruct cloning; the model simply lacks the base variant's multilingual conditioning (<|lang|> tags + CAM++ speaker embedding)
• Cantonese: usable with a same-language reference, degrades with a cross-language reference (Chinese-family behavior, not a hard failure like Greek)

Verified language map (all cells tested, whisper-verified):

	ZH	EN	Cantonese	Other (e.g. Greek)
Clone (base)	OK	OK	OK	OK - use this
Clone (instruct)	OK	OK	same-language ref only	broken even with native ref
Voice Design	OK	OK	untested	broken
Semantic / Acoustic Edit	inherits input audio	OK	inherits input audio	OK (Greek verified)

Changed

• README (EN/ZH) language table corrected: instruct cloning reliable for Chinese/English; Cantonese usable with same-language reference; all other languages -> use base
• Voice Clone node warning upgraded: fires on the resolved language (covers auto detection too) whenever instruct is loaded and the language isn't Chinese/English/Cantonese, telling you to switch the loader variant to fireredtts3_base
• Suite 17/17 passing

Multilingual voice cloning should use FireRedTTS3-Base. Thanks to everyone reporting and testing.