Update Caribou post main image caption formatting

Author: bnubald

src/data/post/may25-publication-caribou-paper.mdx

@@ -19,9 +19,10 @@ import imgCabin from '~/assets/images/posts/may25-publication-caribou-paper/A sm
 
 
 
-<p class="text-center text-sm mt-[-0.5rem] mb-6">
+<div class="text-center italic text-gray-500 dark:text-gray-500 mt-[-0.25rem] mb-4">
     A herd of Barren-ground caribou move through a snowy landscape, Wapusk National Park, Manitoba Canada (Credit Peter Ewins + WWF-Canada)
-</p>
+</div>
+
 
 ## Overview