indentation breaks after named multiline note

[cynhr]

When using the named multiline note syntax, indentation fails.

Similar to #153, that also breaks all following indentation.

Example

@startuml
note as N1
this line should be indented
end note
@enduml

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[cynhr]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

I do not understand how this issue (or any other issue for that matter) would be resolved by waiting without any action.