[PostGIS] #6113: 3.7.0beta2 visual examples build error

[PostGIS]

#6113: 3.7.0beta2 visual examples build error
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  Reporter:  gdt      |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  blocker  |  Milestone:  PostGIS 3.7.0
 Component:  postgis  |    Version:  master
Resolution:           |   Keywords:
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Changes (by gdt):

 * milestone:  PostGIS 3.6.5 => PostGIS 3.7.0
 * priority:  medium => blocker
 * version:  3.6.x => master

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6113#comment:1>
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