Update module github.com/forkcloser/go-graphviz to v0.5.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/forkcloser/go-graphviz	v0.4.0 → v0.5.0

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Release Notes

forkcloser/go-graphviz (github.com/forkcloser/go-graphviz)

v0.5.0

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[closer-claudio]

🛑 at e32ded1. The bump is the right version with the right hashes, but dot cannot take go-graphviz v0.5.0 from a go.mod change alone.

🛑 With v0.5.0, dot -Tdot emits xdot. cmd/dot/main.go:85 and :100 map "dot" and the default to graphviz.XDOT, which v0.5.0 redefined as Graphviz's xdot (go-graphviz#78, Breaking in its changelog); plain DOT is now graphviz.GV. Built with v0.5.0, printf 'digraph{a->b}' | dot -Tdot writes four _draw_ lines. The tests here stay green because TestFormats checks only that the output starts with digraph. So this PR, merged as is, changes the tool's default output silently.

The code fix belongs with the bump: "dot" → graphviz.GV, "xdot" → graphviz.XDOT, and a test that requires no _draw_ for -Tdot and _draw_ for -Txdot. #56 is the hand bump that should carry it (I've asked for the same there, along with the removal of a committed binary). Once #56 lands, this one is redundant; closing it is @apostasie's call.

🔍 The bump itself: both go.sum lines match sum.golang.org, and gg and freetype leave the graph as #81 removed them.

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