Fix mermaid diagrams rendering issue

[davidmirror-ops]

Tracking issue

Closes #4864

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How was this patch tested?

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• I updated the documentation accordingly.
• All new and existing tests passed.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.23%. Comparing base (fd42f65) to head (4bd87f9).
Report is 546 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5373      +/-   ##
==========================================
+ Coverage   58.99%   60.23%   +1.23%     
==========================================
  Files         645      646       +1     
  Lines       55542    45664    -9878     
==========================================
- Hits        32769    27505    -5264     
+ Misses      20182    15569    -4613     
+ Partials     2591     2590       -1     

Flag	Coverage Δ
unittests	?
unittests-datacatalog	69.31% <ø> (?)
unittests-flyteadmin	58.90% <ø> (?)
unittests-flytecopilot	17.79% <ø> (?)
unittests-flyteidl	79.30% <ø> (?)
unittests-flyteplugins	61.94% <ø> (?)
unittests-flytepropeller	57.32% <ø> (?)
unittests-flytestdlib	65.75% <ø> (?)

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[neverett]

@davidmirror-ops I got mermaid diagrams to render locally with mermaid_output_format = "png" plus npm installing mermaid-cli with npm install -g @mermaid-js/mermaid-cli. I'm not sure how to get that installed on the build server, though—@cosmicBboy do you know?