docs: css: Make definition list 'code' entries bold when converted from rst

Docutils don't generate <code> for inline literals (``blah``) in rst
but rather put them in the '.literal' class. Add a selector for making
them bold when used in definition list headers.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

docs/generic.css

@@ -25,7 +25,7 @@ dt {
   margin-right: 2em;
 }
 
-dt code {
+dt code, dt .literal {
   font-weight: bold;
 }