chore: bump cosmos/evm pin to v0.6.2

[0xNilesh]

Points the evm replace at push-chain-evm develop f6a1ba72 (cosmos/evm v0.6.2), up from
2d248e1881bb (v0.6.0).

Changes required: none

go.mod + go.sum only — 2 files, 3 lines. No node code changes were needed. No migration, no proto
change, no ConsensusVersion bump (the evm side had none either).

Tests

go build ./... clean.

go test -p 1 -count=1 -tags="ledger test_ledger_mock test" ./x/... ./test/integration/...
→ exit 0, 17 packages ok, 0 FAIL, including test/integration/uexecutor (15.0s).

The thing this PR was really checking: the module-account guard

cosmos/evm v0.6.1 added a security guard (private fork merge 3524ebc6) in SetBalanceWithLocked:

if acct := k.accountKeeper.GetAccount(ctx, cosmosAddr); acct != nil {
    if _, isModule := acct.(sdk.ModuleAccountI); isModule {
        return errorsmod.Wrapf(errortypes.ErrUnauthorized, "%s is not allowed to receive funds", cosmosAddr)
    }
}

This mattered because Push makes EVM calls from the ue module account (isModuleSender=true, 4 sites
in x/uexecutor/keeper/evm.go), ue is a genuine ModuleAccountI (GetModuleAccount(ctx, "ue"),
registered Minter+Burner at app/app.go:267), and statedb.Commit → SetAccount → SetAccountBalance
runs for every dirty account.

Empirically it does not fire. Verified:

• the guard IS present in the pinned module (x/vm/keeper/statedb.go:164) — this is not a case of the fix
  being absent
• 0 occurrences of not allowed to receive funds across the whole suite
• 86 passing inbound/deposit subtests in test/integration/uexecutor

Inferred mechanism, not proven: SetBalanceWithLocked starts with if amount == nil { return nil },
above the guard, so a dirty account whose balance was never read or written skips it. That fits a module
sender that only bumps its nonce and sends value=0.

⚠️ Because the mechanism is inferred rather than proven, a localnet run exercising a real inbound deposit
is worth doing before this reaches a live network.

Note on scope

This is the develop line, which pins cosmos-sdk v0.53.7. The audit-fixes line pins v0.50.10 and a
different evm commit; it is unaffected by this PR.