docs/rust: Install c2rust with --locked #21236
Merged
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Contribution description
A newer version of a library broke c2rust (dtolnay/proc-macro2#475 is the proc-macro issue, immunant/c2rust#1197 is how c2rust fixed it, but they don't have a new release yet). Until then, using
--locked
is a viable path.Testing procedure
Issues/PRs references
Closes: #21079