Make admonition title larger than text.

Author: stefano-ottolenghi

src/css/doc.css

@@ -794,7 +794,7 @@ body {
 .doc .admonitionblock .title {
   font-weight: bold;
   font-style: normal;
-  font-size: 0.8rem;
+  font-size: 0.9rem;
 }
 
 .doc .imageblock .title {