doc: add using organization logo

[slievrly]

Signed-off-by: slievrly slievrly@163.com

Ⅰ. Describe what this PR did

doc: add using organization logo

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #1951 into develop will decrease coverage by 0.04%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #1951      +/-   ##
=============================================
- Coverage      55.15%   55.11%   -0.05%     
+ Complexity      2404     2402       -2     
=============================================
  Files            429      429              
  Lines          14261    14261              
  Branches        1673     1673              
=============================================
- Hits            7866     7860       -6     
- Misses          5691     5693       +2     
- Partials         704      708       +4

Impacted Files	Coverage Δ	Complexity Δ
...server/store/file/FileTransactionStoreManager.java	56.19% <0%> (-1.27%)	29% <0%> (ø)
...in/java/io/seata/server/session/GlobalSession.java	84.54% <0%> (-0.49%)	67% <0%> (-1%)
...o/seata/server/coordinator/DefaultCoordinator.java	48.01% <0%> (-0.4%)	27% <0%> (-1%)

[lovepoem]

<div style='vertical-align: middle'>
<img src='https://camo.githubusercontent.com/b1477fe051d0f92c2431a606e05f4e3ae5b4ceba/68747470733a2f2f696d672e616c6963646e2e636f6d2f7466732f5442316a3064456f703637674b306a535a506658586168684658612d3430302d3230382e6a7067' height='40' alt='凯京科技'>
<img src="https://camo.githubusercontent.com/900dde1b2db61337f6b1b7099a4f9266c683682f/68747470733a2f2f7777772e6b616e6768656865616c74682e636f6d2f696d616765732f6c6f676f2e706e67" height ="40"  alt='康合上医'>
</div>

I think you can try like this

[lovepoem]

lgtm

[zjinlei]

LGTM