fix sample for API inference (#4)

- fix sample for API inference (9e1198f58c4a9dc5a52e0ff3551949471e89e1d8)


Co-authored-by: Radamés Ajna <radames@users.noreply.huggingface.co>

vae/config.json

@@ -19,7 +19,7 @@
   "layers_per_block": 2,
   "norm_num_groups": 32,
   "out_channels": 3,
-  "sample_size": 512,
+  "sample_size": 768,
   "scaling_factor": 0.18215,
   "up_block_types": [
     "UpDecoderBlock2D",