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.

sitemap.xml

@@ -15414,11 +15414,11 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/faq.html</loc>
-    <lastmod>2025-03-05T17:49:07+00:00</lastmod>
+    <lastmod>2025-03-13T03:37:32+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/faq.md</loc>
-    <lastmod>2025-03-05T17:49:07+00:00</lastmod>
+    <lastmod>2025-03-13T03:37:26+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/inc/index.html</loc>
@@ -15458,11 +15458,11 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/news.html</loc>
-    <lastmod>2025-03-08T05:38:40+00:00</lastmod>
+    <lastmod>2025-03-13T03:00:48+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/news.md</loc>
-    <lastmod>2025-03-08T05:38:40+00:00</lastmod>
+    <lastmod>2025-03-13T03:00:38+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/README.html</loc>
@@ -15478,7 +15478,7 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/status.json</loc>
-    <lastmod>2025-03-08T05:41:00+00:00</lastmod>
+    <lastmod>2025-03-13T03:00:54+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/thanks-for-help.html</loc>