Log Message:
graphics/ruby-RMagick: update to 4.2.3

RMagick 4.2.3 (2021-10-10)

Bug Fixes

* Re-add block syntax deprecation warning and fix in RMagick source (#1279)
  (#1280)
* Doc: Replace Magick::Montage with Magick::ImageList::Montage (#1281)
* Update shadow example (#1297)
* Escape the backslashes in windows error message (#1298)
* Also set the alpha value of the target pixel (#1299)
* Set alpha_trait to BlendPixelTrait when the alpha value of the pixel is
  not opaque. (#1300)