issue
mermaid supports inter-subgraph link for flowchart diagram type:
however obsidian mermaid codeblock does not render link properly:
```mermaid
flowchart TB
c1-->a2
subgraph one
a1-->a2
end
subgraph two
b1-->b2
end
subgraph three
c1-->c2
end
one --> two
three --> two
two --> c2
```
want to do
get obsidian mermaid render inter-subgraph link for flowchart.