fixed conflict between make gen_status and make gen_top_html

The `bin/gen-status.sh` will report that the given markdown file
(`next/rules.md` or `next/guidelines.md`) is the source of the
generated HTML file.  This is so that the HTML produced by either
`make gen_status` or `make gen_top_html` will generated the same
HTML comments.  Moreover the comments in `next/rules.html` and
`next/guidelines.html` refer to the markdown file as the source of
the information instead of a tool such as `bin/gen-status.sh`.

Changed `bin/gen-status.sh` VERSION from "1.5.1 2024-04-28"
to "1.5.2 2024-04-30".

Added news for 2024-04-30 into `news.md`.

Make news dates "less shouty".

Ran `make www` to perform the above.

status.html

@@ -385,8 +385,8 @@
         "no_comment" : "mandatory comment: because comments were removed from the original JSON spec",
         "IOCCC_status_version" : "1.0 2024-03-09",
         "contest_status" : "closed",
-        "news_update" : "2024-04-28T06:28:19+00:00",
-        "status_update" : "2024-03-31T05:02:06+00:00"
+        "news_update" : "2024-04-30T22:38:16+00:00",
+        "status_update" : "2024-04-30T22:51:32+00:00"
     }</code></pre>
 
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