DOCS: fix promo bar

[huynhicode]

📑 Summary

(Base branch set to master.)

This PR contains updates to the promo bar.

Resolves # n/a

📏 Design Decisions

Design decisions made by the Mermaid Chart team.

📋 Tasks

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• 💻 have added necessary unit/e2e tests.
• 📓 have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features.
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Latest commit: 510fd0f

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 17 lines in your changes missing coverage. Please review.

Project coverage is 4.49%. Comparing base (ce99d96) to head (510fd0f).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
.../mermaid/src/docs/.vitepress/components/TopBar.vue	0.00%	17 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #6331      +/-   ##
=========================================
+ Coverage    4.46%   4.49%   +0.03%     
=========================================
  Files         385     382       -3     
  Lines       54352   53988     -364     
  Branches      598     621      +23     
=========================================
  Hits         2425    2425              
+ Misses      51927   51563     -364     

Flag	Coverage Δ
unit	4.49% <0.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
.../mermaid/src/docs/.vitepress/components/TopBar.vue	0.00% <0.00%> (ø)

... and 28 files with indirect coverage changes