openwrt-keyring: apk: use just snapshot key explicitly
Currently we're going to ship all the apk keys in the keyring, but the
preference is to ship and use single release/branch specific key so lets
use openwrt-snapshots.pem for apk explicitly as well.
Fixes: 2cea05002489 ("openwrt-keyring: add apk public key for signing of package indexes")
Signed-off-by: Petr Štetiar <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/16852
Signed-off-by: Robert Marko <[email protected]>
Petr Štetiar