`cargo run -p ci` fails using stable rust

## Bevy version

8fa94a0a0d1aa621e9fcaf860b4343bfe3536220

## What went wrong

The "missing_deref compile fail test" is currently failing on my machine (linux, stable rust 1.70) due to a mismatched error message. CI is not currently failing because it is using nightly (and the expected error was generated with nightly).

I _think_ this is also what @robtfm is hitting in #5703.

I think we should operate under the assumption that Bevy devs are developing on a stable compiler. Compile fail tests should probably pass on stable Bevy / CI should probably also run these tests on stable.