Update readme.md - PHP 8 and Image API 3

Author: jeremytubbs

readme.md

@@ -151,7 +151,7 @@ As defined by Wikipedia a shim is a small library that transparently intercepts
 - [iiif-apis](https://github.com/dbmdz/iiif-apis) - Java IIIF API libraries.
 - [iiif_url](https://github.com/NCSU-Libraries/iiif_url) - Ruby library for creating and parsing IIIF Image API URLs.
 - [iiif-tiler](https://github.com/glenrobson/iiif-tiler) - Java library for generating static IIIF tiles (compliant with the V2.1 and 3.0 of the IIIF Image API). 
-- [image-iiif](https://github.com/conlect/image-iiif) - A bring your own framework solution for implementing IIIF Image API 2.1 with PHP.
+- [image-iiif](https://github.com/conlect/image-iiif) - PHP 8 package for implementing IIIF Image API 3.
 - [iOSTiledViewer](https://github.com/moravianlibrary/iOSTiledViewer) - IIIF image API and Zoomify viewer for iOS, written in Swift.
 - [libvips](https://libvips.github.io/libvips/) - A fast image processing library with low memory needs. Includes an operation that can build image pyramids compatible with IIIF Image API.
 - [Node node-iiif](https://github.com/samvera/node-iiif) - a full-featured image processor supporting the IIIF Image API versions 2.1 and 3.0.