docs: correct formatting issues

[kj800x]

I'm not entirely sure of the correct syntax or the process for testing these docs locally (just doing a drive-by commit on GitHub). I noticed that some of the Warning blocks in the docs had broken formatting. This PR should fix that.

Before

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.99%. Comparing base (d07cf71) to head (52701c4).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #983   +/-   ##
=======================================
  Coverage   71.99%   71.99%           
=======================================
  Files          24       24           
  Lines        3642     3642           
=======================================
  Hits         2622     2622           
  Misses        880      880           
  Partials      140      140           

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[chengfang]

@kj800x thanks for the fix. Can you fix the DCO error by signing off the commit? After that, it should be good to go.

[kj800x]

Thanks for taking a look! I noticed the DCO check failed and looked into it, but I'm not familiar with what 'signing off' a commit entails or its significance. Since this isn't mentioned in the README or contributing documentation, would you mind clarifying? I'm hesitant to sign my name to something without knowing what that means. It might also be helpful to add guidance on this to the contributing docs for future contributors.