Add Awesome-Transformer-Attention

[cmhungsteve]

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Dear @jbhuang0604,

I would be appreciative if you can add this list to your repo: https://github.com/cmhungsteve/Awesome-Transformer-Attention

I have already made a pull request for this: https://github.com/jbhuang0604/awesome-computer-vision/pull/106

Thank you so much!