fix example/cargo test/ CI

[l-const]

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  It did fail the fedora CI thats why i noticed: https://download.copr.fedorainfracloud.org/results/ryanabx/cosmic-epoch-tagged/fedora-rawhide-aarch64/10165201-cosmic-files/builder-live.log.gz . No big deal but it was an easy fix.

fixes #1654

[jacobgkau]

Only code being touched is the example, and this fixes the CI check.