improve data on author_handle.json files

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

author/Col_G_L_Sicherman.json

@@ -4,10 +4,10 @@
     "author_handle" : "Col_G_L_Sicherman",
     "full_name" : "Col. G. L. Sicherman",
     "sort_word" : "sicherman",
-    "location_code" : null,
-    "location_name" : null,
+    "location_code" : "US",
+    "location_name" : "United States of America",
     "email" : "colonel@monmouth.com",
-    "url" : "https://sicherman.net/",
+    "url" : "https://sicherman.net",
     "alt_url" : null,
     "deprecated_twitter_handle" : null,
     "mastodon" : null,