Cargo.toml: Upgrade cortex-a dependency

hermit-os / rust-aarch64

Rust library to use aarch64 specific functionality and registers.

Apache License 2.0

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Closed mkroening closed 2 years ago

mkroening commented 2 years ago

@stlankes, this is required to support newer rust versions in https://github.com/hermitcore/libhermit-rs/pull/330.