Use SVG pedigree icon in chart box

[ekdahl]

After this,
.icon-pedigree { content: url(minimal/images/pedigree.png); }
can be removed from themes, if preferred, to default to SVG icon instead.
https://github.com/fisharebest/webtrees/blob/main/resources/css/minimal.css#L890

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.31%. Comparing base (83044c5) to head (aaa65db).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #5051   +/-   ##
=========================================
  Coverage     35.31%   35.31%           
  Complexity    11406    11406           
=========================================
  Files          1179     1179           
  Lines         47865    47865           
=========================================
  Hits          16905    16905           
  Misses        30960    30960           

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[ekdahl]

If these types of changes are desired, there are other places where I would like to make the same adjustments.