Change grid minmax definition for newsflash module (#30781)

Change grid minmax definition for newsflash module to better fit in small displays
See issue joomla/cassiopeia#119

build/media_source/mod_articles_news/css/template.css

@@ -23,7 +23,7 @@
   .mod-articlesnews-horizontal {
     display: grid;
     grid-gap: 2rem;
-    grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
+    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
   }
   .mod-articlesnews-horizontal li:not(:last-child) {
     margin-right: 0;