Tron: Evaluate "Stake" label for staking UI

**"Stake" label for Tron staking flows**
- Is the "Stake" label sufficient for clarity?
- Reference: [Full flow](https://data.trezor.io/dev/firmware/ui_report/22168463751/passed/T3W1_en-device_tests-tron-test_sign_tx.py::test_sign_tx%5BStake_for_Energy%5D.html)

![Stake label UI screenshot](image1)