switch hifitts link to openslr

README.md

@@ -65,13 +65,13 @@ Model: modified RAVE v1, 48kHz, block size 2048, 16 latent dimensions.
 
 ### voice_hifitts_b2048_r48000_z16.ts
 
-Dataset: [Hi-Fi TTS](http://arxiv.org/abs/2104.01497) audiobooks dataset.
+Dataset: [Hi-Fi TTS](https://www.openslr.org/109/) audiobooks dataset.
 
 Model: modified RAVE v1, 48kHz, block size 2048, 16 latent dimensions.
 
 ### voice_jvs_b2048_r44100_z16.ts
 
-Dataset: [Hi-Fi TTS](http://arxiv.org/abs/2104.01497) speaker 9017 (John Van Stan).
+Dataset: [Hi-Fi TTS](https://www.openslr.org/109/) speaker 9017 (John Van Stan).
 
 Model: RAVE v3, 44.1kHz, block size 2048, 16 latent dimensions.