improve years.html

The `bin/gen-years.sh` has been updated to include the abstract of the
winning entry.

Changed `bin/gen-years.sh` VERSION from "2.1.1 2025-06-06"
ta "2.2.0 2025-07-10".

Ran `make gen_years timestamp` to perform the above.

sitemap.xml

@@ -15282,7 +15282,7 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-years.sh</loc>
-    <lastmod>2025-06-07T02:36:45+00:00</lastmod>
+    <lastmod>2025-07-10T08:42:52+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/html.sed</loc>
@@ -15602,7 +15602,7 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/status.html</loc>
-    <lastmod>2025-07-08T23:40:18+00:00</lastmod>
+    <lastmod>2025-07-10T08:46:27+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/status.json</loc>
@@ -15630,6 +15630,6 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/years.html</loc>
-    <lastmod>2025-06-07T02:38:29+00:00</lastmod>
+    <lastmod>2025-07-10T08:45:52+00:00</lastmod>
 </url>
 </urlset>