doc/nasmdoc.css: @media only print -> @media print

There is no point in using "only" unless there is another
qualifier. The "only" is specifically to prevent older parsers from
unconditionally applying a section with qualifiers.

Signed-off-by: H. Peter Anvin <[email protected]>

Author: H. Peter Anvin

doc/nasmdoc.css

@@ -72,7 +72,7 @@ li.toc2 {
 ul.navbar {
     display: none;
 }
-@media only print {
+@media print {
     a {
 	color: inherit;
     }