improve the status.html page

Changed `bin/gen-status.sh` VERSION from "1.0 2024-03-09"
to "1.1 2024-03-10".

Changed `bin/status2html.sh` VERSION from "1.0 2024-03-09"
to "1.1 2024-03-10".

Improved for explanatory text added near the top of the
`index.html` page by `bin/status2html.sh`.

While `bin/status2html.sh` in intended as tool that is internally
called only, we allowed for a 0 arg use for those who are simply
curious as to what it does.

Tested various _contest_status_ values with `bin/gen-status.sh`.
This resulted in a forced change of _status_update_ in `status.json`.

Removed extraneous whitespace from `bin/output-index-author.sh`.

Performed `make www` to finalize all of the above, although a
`make gen_status` followed by `make gen_sitemap` would have
been sufficient.

status.json

@@ -3,5 +3,5 @@
     "IOCCC_status_version" : "1.0 2024-03-09",
     "contest_status" : "closed",
     "news_update" : "2024-03-10T17:01:11+00:00",
-    "status_update" : "2024-03-10T17:01:12+00:00"
+    "status_update" : "2024-03-10T20:55:10+00:00"
 }