[Pkg-rust-maintainers] Bug#1025690: update clap to v4

[matthias.geiger1024 at tutanota.de]

 clap-derive-3 is merged. I don't know if dch should be amended (i.e. just one entry). See https://salsa.debian.org/rust-team/debcargo-conf/-/commit/5903ecc88fbd59b3dc2b8665e37d3750a97ab527

Cheers

werdahias
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