Fabian Boehm 54fa1ad6ec Revert "Try to move rust CI back to 1.70"
Should *hopefully* be fixed by deleting the cache at https://github.com/fish-shell/fish-shell/actions/caches.

This reverts commit 5c29ff52fb76ad360c2e1078289f4a30022875d5.
2023-07-14 21:36:43 +02:00
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