other: shift characters less for braille graphs

[ClementTsang]

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

Issue

If applicable, what issue does this address?

Closes: #1711

Testing

If relevant, please state how this was tested. All changes must be tested to work:

If this is a code change, please also indicate which platforms were tested:

• Windows
• macOS
• Linux

Checklist

If relevant, ensure the following have been met:

• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 42.20%. Comparing base (508f05b) to head (0480f0d).

Files with missing lines	Patch %	Lines
.../canvas/components/time_graph/time_chart/canvas.rs	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1714      +/-   ##
==========================================
- Coverage   42.23%   42.20%   -0.03%     
==========================================
  Files         112      112              
  Lines       17465    17463       -2     
==========================================
- Hits         7376     7371       -5     
- Misses      10089    10092       +3     

Flag	Coverage Δ
macos-14	37.73% <0.00%> (+<0.01%)	⬆️
ubuntu-latest	44.02% <50.00%> (-0.03%)	⬇️
windows-2019	37.66% <0.00%> (+<0.01%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.