gallery: add The State of Open Source AI

Author: casperdcl

docs/gallery.yml

@@ -451,3 +451,7 @@
   repository: https://github.com/NeuroML/Documentation/
   website: https://docs.neuroml.org
   image: https://docs.neuroml.org/_static/logo.png
+- name: "The State of Open Source AI"
+  repository: https://github.com/premAI-io/state-of-open-source-ai
+  website: https://book.premai.io/state-of-open-source-ai
+  image: https://static.premai.io/logo.png