Fix: Bad contrast in the blog's dark theme in info boxes (#1070)

[ayushk-1801]

Fixed #1070

Added dark mode CSS so that the info boxes looks better.

[github-actions]

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[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (327f1ba) to head (b60e91b).
Report is 34 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1131   +/-   ##
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  Coverage   100.00%   100.00%           
=========================================
  Files           10        10           
  Lines          373       373           
  Branches        94        94           
=========================================
  Hits           373       373           

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[aialok]

@ayushk-1801 Thank you for the PR.

However, this issue still seems to persist. Could you please check and fix it?

https://ayushk-1801-main.website-2v2.pages.dev/blog/posts/applicability-json-schema-fundamentals-part-1#applicator-keywords