rulez: switch default branch of cargo-mozilla from v2021 to v2023
cargo-mozilla is now required in Apertis v2022 and v2023 in order to build new versions of firefox-esr
🟡 v2023.5 entered Soft Feature Freeze, no additional features will be accepted • schedule
cargo-mozilla is now required in Apertis v2022 and v2023 in order to build new versions of firefox-esr