Update training_zoo.mdx (#1397)

docs/source/usage_guides/training_zoo.mdx

@@ -47,6 +47,7 @@ These examples showcase every feature in Accelerate at once that was shown in "F
 
 - [Complete NLP example](https://github.com/huggingface/accelerate/blob/main/examples/complete_nlp_example.py)
 - [Complete computer vision example](https://github.com/huggingface/accelerate/blob/main/examples/complete_cv_example.py)
+- [Very complete and extensible vision example](https://github.com/yuvalkirstain/PickScore)
 - [Causal language model fine-tuning example](https://github.com/huggingface/transformers/blob/main/examples/pytorch/language-modeling/run_clm_no_trainer.py)
 - [Masked language model fine-tuning example](https://github.com/huggingface/transformers/blob/main/examples/pytorch/language-modeling/run_mlm_no_trainer.py)
 - [Speech pretraining example](https://github.com/huggingface/transformers/blob/main/examples/pytorch/speech-pretraining/run_wav2vec2_pretraining_no_trainer.py)
@@ -114,4 +115,4 @@ These are tutorials from libraries that integrate with 🤗 Accelerate:
 
 ### trlx 
 
-- [How to implement a sentiment learning task with trlx](https://github.com/CarperAI/trlx#example-how-to-add-a-task)
+- [How to implement a sentiment learning task with trlx](https://github.com/CarperAI/trlx#example-how-to-add-a-task)