editorial: retire Steve Faulkner as Editor (#459)

Based on: 
https://lists.w3.org/Archives/Public/public-webapps/2023AprJun/0010.html

Thank you, Steve, for your service! 🫡

Co-authored-by: Scott O'Hara <[email protected]>

Author: marcoscaceres

index.html

@@ -11,7 +11,8 @@
           name: "Steve Faulkner",
           company: "TPGi",
           companyURL: "https://www.tpgi.com/",
-          w3cid: "35007"
+          w3cid: "35007",
+          retiredDate: "2023-04-28"
         },
         {
           name: "Scott O'Hara",