fix(deps): update rust crate rustic_backend to v0.6.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rustic_backend (source)	dependencies	minor	=0.5.4 → =0.6.1

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Release Notes

rustic-rs/rustic_core (rustic_backend)

v0.6.1

Compare Source

Fixed

• use rclone url as-is for rclone command (#​485)
• ignore non-id files when listing (#​479)

Other

• update dependencies (#​486)

v0.6.0

Compare Source

Added

• [breaking] Add support for batch warmup (#​438)
• (backend/opendal) include scheme in location() and bump opendal to 0.55.0 (#​446)

Fixed

• fix clippy lints (#​473)
• Use jiff everywhere (#​467)

Other

• update dependencies (#​475)
• update MSRV to 1.88.0 (#​471)

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