Fix reference from ustake to utoken to fix accounting

[silostaking]

Fixing a reference in our adapter. You can see it here, querying the state directly. As of 10/2/2024 the state is:

{
  "data": {
    "total_ustake": "156329708588359",
    "total_utoken": "161521021712271",
    "exchange_rate": "1.033207463704685547",
    "unlocked_coins": [
      {
        "denom": "usei",
        "amount": "12828721273"
      }
    ],
    "unbonding": "3425220778859",
    "available": "150481022080",
    "tvl_utoken": "165096723513210"
  }
}

The total_ustake is the amount of iSEI issued (which because is rewards-bearing the price is diverging from SEI). To get the proper TVL in SEI/dollars, we change this to using total_utoken.

Thanks to jas*** for finding and identifying this bug.

[llamatester]

The adapter at projects/silostake exports TVL:

sei                       72.38 M

total                    72.38 M 

[g1nt0ki]

thanks for the finding the bug & fixing it