update readme

README.md

@@ -53,6 +53,7 @@ However, I estimate a model of similar quality can be trained with fewer than 20
 
 - The model was first trained for 18000 steps, at batch size 8, lr 1e-6, resolution 640, and conditional dropping rate of 15%.
 - After this, I modified a little the captions and trained the model for another 22000 steps, at batch size 8, lr 1e-6, reslution 704, and conditional dropping rate of 15%.
+(Intermediate checkpoints can be found in the branch `all`)
 
 Note that as a consequence of the weighting scheme which translates into a number of different multiply for each image,
 the count of repeat and epoch has a quite different meaning here.