Fix a configuration example in gantt.md

[michaelbaudino]

📑 Summary

According to the config schema docs, Gantt's tickInterval configuration must match the following regular expression, which does not allow any space:

/^([1-9][0-9]*)(millisecond|second|minute|hour|day|week|month)$/

This PR simply changes the example to be valid regarding this regular expression (otherwise, using the value in the example has no effect 😕).

📏 Design Decisions

N/A

📋 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: 8cb1c68

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 4.50%. Comparing base (8d0902d) to head (8cb1c68).

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #6001   +/-   ##
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  Coverage     4.50%   4.50%           
=======================================
  Files          383     383           
  Lines        53873   53873           
  Branches       622     622           
=======================================
  Hits          2425    2425           
  Misses       51448   51448           

Flag	Coverage Δ
unit	4.50% <ø> (ø)

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