explicitly state libheif -> --with-heic

Author: henderkes

src/SPC/builder/unix/library/imagemagick.php

@@ -28,6 +28,7 @@ protected function build(): void
             'libpng' => 'png',
             'libwebp' => 'webp',
             'libxml2' => 'xml',
+            'libheif' => 'heic',
             'zlib' => 'zlib',
             'xz' => 'lzma',
             'zstd' => 'zstd',