Update data_structures_advanced.mmd

Author: djeada

resources/data_structures_advanced.mmd

@@ -1,4 +1,3 @@
-```mermaid
 flowchart LR
     Start((Start))
     Start --> OrderImportant{Order is Important?}
@@ -46,4 +45,3 @@ flowchart LR
 
     Sep2 -- yes --> unordered_multimap[unordered_multimap]
     Sep2 -- no  --> unordered_multiset[unordered_multiset]
-```