Underline text links throughout the community site

Make links distinguishable from surrounding prose and table text without changing their font size, family, or weight.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: dblock

_sass/typography.scss

@@ -25,7 +25,7 @@ h6 {
 // Links
 // --------------------------------------------------
 a { 
-	text-decoration: none;
+	text-decoration: underline;
 	color: $link-color; 
 	&:visited { 
 		color: $linkcolorvisited;