ci: try to use rust-cache instead of github cache action #6
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What
Update workflows to use Swatinem/rust-cache
Why
The current cache setup doesn't cache the built artifacts causing us to have to build too much for small changes to the code. This PR is an attempt to optimise caching using rust-cache (an action optimised for caching rust-projects) rather than cache. The hope is that this will increase build speed for small changes