Fixed List Avatar position

[nikogu]

fixed: https://github.com/ant-design/ant-design/issues/4905#issuecomm…

[codecov]

Codecov Report

Merging #7875 into antd-3.0 will increase coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           antd-3.0    #7875      +/-   ##
============================================
+ Coverage     83.13%   83.13%   +<.01%     
============================================
  Files           219      219              
  Lines          4440     4441       +1     
  Branches       1335     1337       +2     
============================================
+ Hits           3691     3692       +1     
  Misses          749      749

Impacted Files	Coverage Δ
components/list/Item.tsx	98.11% <ø> (+0.03%)	⬆️

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