[MacPorts] #49513: webp @0.4.3_0: update to 0.4.4

[MacPorts]

#49513: webp @0.4.3_0: update to 0.4.4
----------------------------+--------------------------------
 Reporter:  mschamschula@…  |      Owner:  macports-tickets@…
     Type:  update          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.3.4
 Keywords:  haspatch        |       Port:  webp
----------------------------+--------------------------------
 webp has been updated to version 0.4.4: This is a binary compatible
 release.

 * rescaling out-of-bounds read fix
 * various build fixes and improvements
 * container documentation update
 * gif2webp transparency fix

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Ticket URL: <https://trac.macports.org/ticket/49513>
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