Replace end with flex-end for better browser support

Author: sergioalvz

layouts/Post/components/Footer/style.css

@@ -9,7 +9,7 @@
   gap: 0.5rem;
   margin: 0;
   padding: 0;
-  justify-content: end;
+  justify-content: flex-end;
 
   list-style-type: none;
 }