[SAC] [OSGeo] #2551: Upgrade wordpress to 5.6 from 5.5.1

[OSGeo]

#2551: Upgrade wordpress to 5.6 from 5.5.1
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 Reporter:  robe           |      Owner:  sac@…
     Type:  task           |     Status:  new
 Priority:  normal         |  Milestone:  Sysadmin Contract 2021-I
Component:  Systems Admin  |   Keywords:
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 On osgeo.org we are currently running 5.5.1.

 Also we need to upgrade PHP as well.

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2551>
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