Update merm.html

merm.html

@@ -8,8 +8,8 @@
 
 <style>
   #chart_box{
-    display: block;
-      }
+    text-align: center;
+  }
 
   
 </style>
@@ -39,10 +39,10 @@
         startOnLoad: true,
         securityLevel: 'loose',
         flowchart: {
-          useMaxWidth: 0,
+          useMaxWidth: !0,
         },
         gantt: {
-          useMaxWidth: 0,
+          useMaxWidth: !0,
         },
       }
       //const mermaidConfig = merge(defaultConfig, config)