[RTEMS Project] #3880: Update sphinx_rtd_theme to 68a19ca / 0.4.3.dev0.

[RTEMS trac]

#3880: Update sphinx_rtd_theme to 68a19ca / 0.4.3.dev0.
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  Reporter:  Amar Takhar  |      Owner:  (none)
      Type:  defect       |     Status:  assigned
  Priority:  normal       |  Milestone:
 Component:  doc          |    Version:
  Severity:  normal       |   Keywords:  sphinx, search
Blocked By:               |   Blocking:
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 I've been running this version for a while now.  It should fix any issues
 we're having I tested it and it works fine.

 This should fix the search issues we've been having.

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Ticket URL: <http://devel.rtems.org/ticket/3880>
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