docs: format 'Caddy'

[PisecesPeng]

This PR just converted the case format of 'Caddy'

Changes

• update guide.md

Checklist

• updated CHANGELOG.md

[codecov]

Codecov Report

Merging #3532 (954167e) into main (56abc4a) will not change coverage.
The diff coverage is n/a.

❗ Current head 954167e differs from pull request most recent head aa9fadf. Consider uploading reports for the commit aa9fadf to get more accurate results

@@           Coverage Diff           @@
##             main    #3532   +/-   ##
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  Coverage   59.21%   59.21%           
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  Files          35       35           
  Lines        1709     1709           
  Branches      379      379           
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  Hits         1012     1012           
  Misses        559      559           
  Partials      138      138           

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[repo-ranger]

Thanks for making your first contribution! 🙂

[jsjoeio]

Awesome! Thanks so much for the doc update @PisecesPeng 🙌

Can you:

• rebase your branch so it's up-to-date with main
• [optional] update the CHANGELOG if you want us to credit you in the next release :)

[jsjoeio]

LGTM! Thanks again 😄

[PisecesPeng]

LGTM! Thanks again 😄

@jsjoeio 😁 thank you for your suggestions