improve data on author_handle.json files

Updated URLs, Email addresses, GitHub handles,
Mastodon handles, and locations of various IOCCC winning authors.

author/Edward_Giles.json

@@ -7,7 +7,7 @@
     "location_code" : "AU",
     "location_name" : "Australia",
     "email" : "edward@giles.net.au",
-    "url" : "https://id523a.com/",
+    "url" : "https://id523a.com",
     "alt_url" : null,
     "deprecated_twitter_handle" : null,
     "mastodon" : null,