doc: update README_zh.md

[fengyuwusong]

Description (what this PR does / why we need it):

发现中文版介绍部分链接失效，进行修复。

Which issue(s) this PR fixes (resolves / be part of):

Other special notes for the reviewers:

[codecov-commenter]

Codecov Report

Merging #2208 (39d4501) into main (1ab3d8f) will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2208      +/-   ##
==========================================
+ Coverage   85.68%   85.73%   +0.05%     
==========================================
  Files          86       86              
  Lines        3758     3758              
==========================================
+ Hits         3220     3222       +2     
+ Misses        371      369       -2     
  Partials      167      167              

Impacted Files	Coverage Δ
internal/context/context.go	100.00% <0.00%> (+2.98%)	⬆️

---

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 1ab3d8f...39d4501. Read the comment docs.

[daemon365]

examples可以用的吧

[fengyuwusong]

examples可以用的吧

examples链接已失效，更改为和英文文档链接一致，同时go-kratos.dev页面也存在相关examples链接。