update FAQ and news as per new mkiocccentry release

Added news based on the recent
[release 2.4.3 2025-03-11](https://github.com/ioccc-src/mkiocccentry/releases/tag/2.4.3)
of the [mkiocccentry toolkit](https://github.com/ioccc-src/mkiocccentry).

Updated the FAQ with additional information about the above mentioned release.

Fixed use of double blank lines in `faq.md` so that they:

- precede all markdown headings
- precede and follow all "Jump to top" lines

Added missing "Jump to top" lines.

Fixed Section 2 internal link.

Performed `make www gen_status gen_sitemap timestamp` to update the website.

status.html

@@ -434,7 +434,7 @@
         "no_comment" : "mandatory comment: because comments were removed from the original JSON spec",
         "IOCCC_status_version" : "1.0 2024-03-09",
         "contest_status" : "open",
-        "news_update" : "2025-03-08T05:38:40+00:00",
+        "news_update" : "2025-03-13T03:00:38+00:00",
         "status_update" : "2025-03-05T18:15:23+00:00"
     }</code></pre>