doc: adjust TOC margins

PR-URL: #28075 Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]> Reviewed-By: Yongsheng Zhang <[email protected]>

Author: silverwind

doc/api_assets/style.css

@@ -353,10 +353,13 @@ hr{
 
 #toch2{
 margin-top:0;
-line-height:0;
 margin:1.5rem0;
 }
 
+#tocp{
+margin:0;
+}
+
 #tocula{
 text-decoration:none;
 }