[OE-core] [PATCH] ghostscript: Update URL_SRI considered as 'old release'

[Leonardo Sandoval]

> Actually, the same 9.18 tarball is available here:
>
> https://github.com/ArtifexSoftware/ghostpdl-downloads/releases
>
> so why not switch SRC_URI to that?
>
You are right. Sending v2 now.
>
> Alex
>