build(deps): bump graphviz from 0.15 to 0.16 in /depobs

[dependabot-preview[bot]]

Bumps graphviz from 0.15 to 0.16.

Changelog

Sourced from graphviz's changelog.

Version 0.16

Add .unflatten() method to Graph, Digraph, and Source. Add standalone unflatten().

Make Source.__str__() return the .source instead of the repr() (like Graph and Digraph).

Render with dot -K<engine> ... instead of <engine> ... internally (work around upstream issue <https://gitlab.com/graphviz/graphviz/-/issues/1753>_).

Add documentation hint to archived upstream version for Windows.

Re-render most documentation graphs with Graphviz 2.44.1.

Commits

• 54b4eec release 0.16
• ebd2f99 duplicate notebook under old name to work around nbviewer cache invalidation
• d58fe75 reformat link
• 6c81671 document latest changes
• 384457a add hint for archived graphviz-2.38.msi to workaround known issues
• cf0146e re-render most graphs with latest Graphviz 2.44.1
• 422adc1 workaround Graphviz 2.44.1 missing engine commands except dot under Windows
• f97f2ab add chdir so the checked-out version is used
• bdab503 rename notebook.ipynb to graphviz-notebook.ipynb
• ab7e243 move default encoding definition to backend, re-order engine, format, encoding
• Additional commits viewable in compare view

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