fix wrong image path for architecture

[TommyLemon]

the original image path "https://github.com/vesoft-inc/nebula-docs/raw/master/images/Nebula%20Arch.png" is outdated and cannot be loaded by browsers.
https://github.com/vesoft-inc/nebula/blob/master/README-CN.md

I used the image path for architecture from English README as a replacement.

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Description:

How do you solve it?

Replace with the image path from English README.md

And now it can show the image.

Special notes for your reviewer, ex. impact of this fix, design document, etc:

Checklist:

Tests:

• Unit test(positive and negative cases)
• Function test
• Performance test
• N/A

Affects:

• Documentation affected (Please add the label if documentation needs to be modified.)
• Incompatibility (If it breaks the compatibility, please describe it and add the label.）
• If it's needed to cherry-pick (If cherry-pick to some branches is required, please label the destination version(s).)
• Performance impacted: Consumes more CPU/Memory

Release notes:

Please confirm whether to be reflected in release notes and how to describe:
Fixed image loading error for Chinese README.md

[CLAassistant]

All committers have signed the CLA.

[Sophie-Xie]

Thanks for contribution.
But I think we should change the image link from doc, @randomJoe211 pls check it.

[randomJoe211]

@TommyLemon Thanks! Please use this stable URL:
https://docs-cdn.nebula-graph.com.cn/figures/nebula-graph-architecture_3.png
And please sign the CLA.

[TommyLemon]

@TommyLemon Thanks! Please use this stable URL: https://docs-cdn.nebula-graph.com.cn/figures/nebula-graph-architecture_3.png And please sign the CLA.

@randomJoe211 Hi, I've already changed the architecture image path with the url you gave me:

[wey-gu]

Thanks!

[codecov-commenter]

Codecov Report

Merging #4471 (54f08a9) into master (b20964a) will increase coverage by 0.12%.
The diff coverage is 84.69%.

@@            Coverage Diff             @@
##           master    #4471      +/-   ##
==========================================
+ Coverage   84.56%   84.68%   +0.12%     
==========================================
  Files        1344     1346       +2     
  Lines      134121   134256     +135     
==========================================
+ Hits       113414   113701     +287     
+ Misses      20707    20555     -152     

Impacted Files	Coverage Δ
src/graph/executor/StorageAccessExecutor.h	60.00% <ø> (-4.45%)	⬇️
src/graph/executor/query/AppendVerticesExecutor.h	100.00% <ø> (ø)
src/graph/executor/query/GetEdgesExecutor.h	100.00% <ø> (ø)
src/graph/executor/query/GetNeighborsExecutor.h	100.00% <ø> (ø)
src/graph/executor/query/GetVerticesExecutor.h	100.00% <ø> (ø)
src/graph/service/PermissionCheck.cpp	79.59% <ø> (-1.66%)	⬇️
src/graph/validator/FetchEdgesValidator.h	100.00% <ø> (ø)
.../graph/validator/test/GetSubgraphValidatorTest.cpp	100.00% <ø> (ø)
src/meta/processors/job/BalanceJobExecutor.cpp	66.66% <ø> (+1.51%)	⬆️
src/meta/processors/job/BalanceJobExecutor.h	75.00% <ø> (ø)
... and 80 more

---

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[Sophie-Xie]

@TommyLemon Thanks! pls sign the CLA, otherwise I can't merge.

[TommyLemon]

@TommyLemon Thanks! pls sign the CLA, otherwise I can't merge.

@Sophie-Xie ok, I've already signed the CLA