docs: correct lineage wording (fine-tuned from closest-language base)

README.md

@@ -5,6 +5,8 @@ license: cc-by-nc-nd-4.0
 pipeline_tag: text-to-speech
 datasets:
 - TigreGotico/tts-train-synthetic-miro_nl-NL
+base_model:
+- OpenVoiceOS/pipertts_pt-PT_miro
 tags:
 - piper
 - onnx
@@ -15,7 +17,7 @@ tags:
 
 # pipertts_nl-NL_miro
 
-This is a text-to-speech voice model for **Dutch**. The voice is **Miro**, a male voice. It uses the Piper VITS architecture, exported to ONNX for CPU inference.
+This is a text-to-speech voice model for **Dutch**. The voice is **Miro**, a male voice. It uses the Piper VITS architecture, exported to ONNX for CPU inference. It was fine-tuned from the base voice `pipertts_pt-PT_miro`, the closest available language for this voice.
 
 ## How to use