Fix: base apy to reward apy

[Magicking]

This pull request includes a small but significant change to the src/adaptors/usual-money/index.js file. The change involves renaming a variable to better reflect its purpose.

Variable renaming:

• src/adaptors/usual-money/index.js: The variable apyBase has been renamed to apyReward to clarify that it represents the reward-based APY rather than the base APY.

[llamatester]

The usual-money adapter exports pools:

Test Suites: 1 passed, 1 total
Tests: 11 passed, 11 total
Snapshots: 0 total
Time: 0.27 s
Ran all test suites.

Nb of pools: 1
 

Sample pools:
┌─────────┬──────────────────────────────────────────────┬────────────┬───────────────┬──────────┬────────────────────┬──────────────────┬──────────────────────────────────────────────────┬──────────────────────────────────────────────────┐
│ (index) │                     pool                     │   chain    │    project    │  symbol  │       tvlUsd       │    apyReward     │                   rewardTokens                   │                 underlyingTokens                 │
├─────────┼──────────────────────────────────────────────┼────────────┼───────────────┼──────────┼────────────────────┼──────────────────┼──────────────────────────────────────────────────┼──────────────────────────────────────────────────┤
│    0    │ '0x35D8949372D46B7a3D5A56006AE77B215fc69bC0' │ 'Ethereum' │ 'usual-money' │ 'USD0++' │ 460576378.01666075 │ 44.6144589342401 │ [ '0xC4441c2BE5d8fA8126822B9929CA0b81Ea0DE38E' ] │ [ '0x73A15FeD60Bf67631dC6cd7Bc5B6e8da8190aCF5' ] │
└─────────┴──────────────────────────────────────────────┴────────────┴───────────────┴──────────┴────────────────────┴──────────────────┴──────────────────────────────────────────────────┴──────────────────────────────────────────────────┘