Update sample size to 64

deprecate("sample_size<64", "1.0.0", deprecation_message, standard_warn=False)

unet/config.json

@@ -22,7 +22,7 @@
   "norm_eps": 1e-05,
   "norm_num_groups": 32,
   "out_channels": 4,
-  "sample_size": 32,
+  "sample_size": 64,
   "up_block_types": [
     "CrossAttnUpBlock2D",
     "UpBlock2D"