CI failure: `Could not verify signature. Please contact Codecov if problem continues`

https://github.com/ankidroid/Anki-Android/actions/runs/16440066058/job/46458618208

Seen this one a few times now

```
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/ ____| | |
| | ___ __| | ___ ___ _____ __
| | / _ \ / _` |/ _ \/ __/ _ \ \ / /
| |___| (_) | (_| | __/ (_| (_) \ V /
\_____\___/ \__,_|\___|\___\___/ \_/
Wrapper-0.2.1

==> Detected macos
-> Downloading https://cli.codecov.io/latest/macos/codecov
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed

0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 15.6M 100 15.6M 0 0 61.4M 0 --:--:-- --:--:-- --:--:-- 61.6M
==> Finishing downloading macos:latest
Version: v11.0.3

gpg: directory '/Users/runner/.gnupg' created
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0
==> Verifying GPG signature integrity
-> Downloading https://cli.codecov.io/latest/macos/codecov.SHA256SUM
-> Downloading https://cli.codecov.io/latest/macos/codecov.SHA256SUM.sig

gpg: Signature made Thu May 29 21:23:40 2025 UTC
gpg: using RSA key 27034E7FDB850E0BBC2C62FF806BB28AED779869
gpg: Can't check signature: No public key
==> Could not verify signature. Please contact Codecov if problem continues
Exiting...
Error: Process completed with exit code 1.
```