chore(deps): update rust crate arrow_56 to v56.2.1

This MR contains the following updates:

Package	Type	Update	Change
arrow_56	workspace.dependencies	patch	56.2.0 -> 56.2.1

MR created with the help of gitlab-org/frontend/renovate-gitlab-bot

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Release Notes

apache/arrow-rs (arrow_56)

v56.2.1: arrow 56.2.1

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Changelog

56.2.1 (2026-05-07)

Full Changelog

Fixed bugs:

• [arrow-buffer] Integer overflow in BufferBuilder::reserve leads to undefined behavior #​9897 [arrow]
• [arrow-array] Integer overflow in FixedSizeBinaryArray::value leads to undefined behavior #​9898 [arrow]
• [arrow-data] Integer overflow in ArrayData::slice leads to undefined behavior #​9899 [arrow]
• [arrow-data] Integer overflow in ArrayData validation leads to undefined behavior #​9900 [arrow]
• [arrow-row] Integer overflow in Rows::row index handling leads to undefined behavior #​9901 [arrow]
• [arrow-buffer] Integer overflow in BitChunks::new leads to undefined behavior #​9903 [arrow]

Merged pull requests:

• [56_maintenance] Prevent ArrayData::slice length overflow (#​9813) #​9916 [arrow] (alamb)
• [56_maintenance] Prevent FixedSizeBinaryArray i32 offset overflows (#​9872) #​9917 [arrow] (alamb)
• [56_maintenance] Prevent buffer builder length overflow in MutableBuffer::extend_zeros (#​9820) #​9915 [arrow] (alamb)
• [56_maintenance] Prevent ArrayData validation length overflow (#​9816) #​9914 [arrow] (alamb)
• [56_maintenance] Prevent Rows row index overflow (#​9817) #​9913 [arrow] (alamb)
• [56_maintenance] Prevent BitChunks length overflow (#​9818) #​9896 [arrow] (alamb)
• [56_maintenance] Fix cargo_audit: Pin cargo-msrv and Cargo.lock in CI #​9902 (alamb)

* This Changelog was automatically generated by github_changelog_generator

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