[MacPorts] #70475: libheif: update to 1.18.1

[MacPorts]

#70475: libheif: update to 1.18.1
------------------------+---------------------------------
 Reporter:  mohd-akram  |      Owner:  MarcusCalhoun-Lopez
     Type:  update      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  libheif
------------------------+---------------------------------


-- 
Ticket URL: <https://trac.macports.org/ticket/70475>
MacPorts <https://www.macports.org/>
Ports system for macOS