Set limit to 1 in get_wallet_nfts example

[smk762]

Issue Description

Using the existing example for evm_api.nft.get_wallet_nfts returns the following error: HTTP response body: b'{"message":"limit must not be less than 1"}'

Solution Description

Note: There may be other instances where this occurs, as I see "limit": 0 used in other examples. Unfortunately I lack the time to check them all myself.