fix(docs): mmd detection

docs/8.6.0_docs.md

@@ -77,7 +77,19 @@ When deployed within code, init is called before the graph/diagram description.
 
 **for example**:
 
-```mmd
+```mermaid-example
+%%{init: {"theme": "default", "logLevel": 1 }}%%
+ graph LR
+  a-->b
+  b-->c
+  c-->d
+  d-->e
+  e-->f
+  f-->g
+  g-->
+```
+
+```mermaid
 %%{init: {"theme": "default", "logLevel": 1 }}%%
  graph LR
   a-->b