docs: update powered-by file

[guoqqqi]

What this PR does / why we need it:

Updated by July 9, 2021 User logo, and sorted by English name A-Z

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[guoqqqi]

After sorting confirmation, the A-Z markers will be removed.
Remark.

• doggy.cool (link won't open)
• zhuzheng ? (Is this an individual or an organization)
• 小糖科技 (is it sugar beans?)
  See
  Who is using Apache APISIX? #487

[membphis]

We need to update this picture:

[Yiyiyimu]

We need to update this picture:

Hi @guoqqqi, we also need to update the list on website

[juzhiyuan]

@iamayushdas Hi, do you have the Logo Wall project file?

[iamayushdas]

@iamayushdas Hi, do you have the Logo Wall project file?

I am not sure if i still have that, but i could make one @juzhiyuan

[juzhiyuan]

🤔 because this image will get updated frequently, would better put a project file on Figma/PhotoShop or some other tools :)

[iamayushdas]

Oh yes I remember i have putted it in figma

[juzhiyuan]

That would be better, @Serendipity96 will need to select some logos, I will tell her to contact you :)

[iamayushdas]

That would be better, @Serendipity96 will need to select some logos, I will tell her to contact you :)

okay sir