Update index.html

index.html

@@ -29,21 +29,10 @@ journey
 
 <div class="mermaid">
 mindmap
-    root((mindmap))
-    Origins
-        Long history
-        Popularisation
-        British popular psychology author Tony Buzan
-    Research
-        On effectiveness<br/>and features
-        On Automatic creation
-                Uses
-                    Creative techniques
-                    Strategic planning
-                    Argument mapping
-    Tools
-        Pen and paper
-        Mermaid
+Root
+    A
+      B
+      C
 </div>
 
 <div class="mermaid">