Fix: comment details to display markdown correctly. closes #43

[ryuash]

Description

fixes #43

Checklist

• [x] Targeted PR against correct branch.
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [x] Wrote unit tests.
• [x] Updated the documentation.
• [x] Added an entry to the CHANGELOG.md file.
• [x] Re-reviewed Files changed in the Github PR explorer.

[codecov[bot]]

Codecov Report

Merging #46 into master will decrease coverage by 0.00%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #46      +/-   ##
==========================================
- Coverage   18.01%   18.01%   -0.01%     
==========================================
  Files         245      245              
  Lines        5967     5968       +1     
==========================================
  Hits         1075     1075              
- Misses       4892     4893       +1     

Impacted Files	Coverage Δ
..._details/post_comments_list/post_comment_item.dart	0.00% <0.00%> (ø)

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