Update model for hyde/chroma cookbook

Updates the hyde-with-chroma-and-openai cookbook to use gpt-4o, additionally
fixing some small issues from library updates.

Author: brandonbaker-openai

authors.yaml

@@ -290,4 +290,9 @@ julian-openai:
 
 rzhao-openai:
   name: "Randy Zhao"
-  website: "https://www.linkedin.com/in/randy-zhao-27433616b"
+  website: "https://www.linkedin.com/in/randy-zhao-27433616b"
+  
+brandonbaker-openai:
+  name: "Brandon Baker"
+  website: "https://www.linkedin.com/in/brandonbaker18"
+  avatar: "https://avatars.githubusercontent.com/u/208719822"