fix(uptime-chart): Set max-width to 1rem (backport #5421)

[mergify]

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This is an automatic backport of pull request #5421 done by [Mergify](https://mergify.com).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.77%. Comparing base (639a6d4) to head (68cb2f0).

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5423       +/-   ##
===========================================
+ Coverage   50.72%   72.77%   +22.04%     
===========================================
  Files         843      101      -742     
  Lines       68808    16140    -52668     
  Branches      274      274               
===========================================
- Hits        34904    11746    -23158     
+ Misses      33883     4373    -29510     
  Partials       21       21               

Flag	Coverage Δ
dashboard	72.77% <ø> (ø)

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