fix: date-fns format string compatible

[fireairforce]

resolve ant-design/ant-design#25881

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/react-component/picker/egm3a9crw
✅ Preview: https://picker-git-fork-fireairforce-fix-date-fns.react-component.vercel.app

[fireairforce]

感觉这里要在文档里说明下，date-fns的这个日期串的格式要做一下兼容。。。
https://date-fns.org/v2.15.0/docs/Unicode-Tokens
这里的这个兼容有点难处理QuQ

[codecov]

Codecov Report

Merging #111 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #111   +/-   ##
=======================================
  Coverage   99.59%   99.59%           
=======================================
  Files          45       45           
  Lines        1965     1967    +2     
  Branches      588      580    -8     
=======================================
+ Hits         1957     1959    +2     
  Misses          6        6           
  Partials        2        2           

Impacted Files	Coverage Δ
src/generate/dateFns.ts	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 40754cf...5dfb445. Read the comment docs.

[fireairforce]

@zombieJ 来CC～👀

[zombieJ]

+ rc-picker@1.15.1