Fix main section position so that the search input remains clickable

Author: GuillaumeGomez

src/librustdoc/html/static/rustdoc.css

@@ -1569,6 +1569,10 @@ h4 > .notable-traits {
 		height: 73px;
 	}
 
+	#main {
+		margin-top: 100px;
+	}
+
 	#main > table:not(.table-display) td {
 		word-break: break-word;
 		width: 50%;