Update Rust crate curve25519-dalek to v5.0.0-rc.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
curve25519-dalek (source)	dependencies	patch	=5.0.0-pre.6 → =5.0.0-rc.0

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Release Notes

dalek-cryptography/curve25519-dalek (curve25519-dalek)

v5.0.0-rc.0

• Remove ff and group features until they have a release (#​907)
• Perf: Use maximum available NAF window size in VartimePrecomputedStraus (#​848)
• Add Lizard bytes-to-point injection for Ristretto. Gated under lizard feature. (#​826)
• Rename Scalar::batch_invert -> Scalar::invert_batch for consistency. Also make it no-alloc. (#​789)
• Add an allocating batch inversion called Scalar::invert_batch_alloc (#​789)
• Add Scalar::div_by_2 (#​805)
• Add EdwardsPoint::hash_to_curve (#​786)
• Undeprecate Scalar::from_bits()
• Remove deprecated functions FieldElement::as_bytes() and EdwardsPoint::nonspec_map_to_curve()
• Upgrade rand_core dependency to v0.10.0
• Upgrade digest and sha2 deps
• Update edition to 2024
• Update the MSRV from 1.60 to 1.85
• Use constant-time equality testing for compressed Ristretto and Edwards points, rather than autoderived equality

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