--print-inheritance-dot incompatible with GraphViz v8.x?

[mr-c]

See the nonsense coordinates produced at common-workflow-language/common-workflow-language.github.io@0c84b7e#diff-8491d56fa84c7cab5a6bd3b018bdaf7ef72f4ed1e634ba7c63c467cbb7c27d78R108

Reported by @tetron