fix(authors): clamp card tagline to 2 lines with ellipsis

Long taglines wrapped raggedly on the author list. Clamp to two lines so a
truncated tagline shows a trailing ellipsis, signalling more on the profile.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: HeyItsGilbert

themes/powershell-community/layouts/_default/authors.html

@@ -68,7 +68,7 @@ <h2 class="text-2xl font-bold text-center text-gray-900 mb-1">
                     </h2>
 
                     {{ with $tagline }}
-                    <p class="text-center text-gray-600 text-sm mb-3">{{ . }}</p>
+                    <p class="text-center text-gray-600 text-sm mb-3 line-clamp-2">{{ . }}</p>
                     {{ end }}
 
                     <!-- Article Count -->