Feat/update staking api

[drohit-cb]

What changed? Why?

This PR helps:

1. Update the Go sdk with latest generated code to fix a breakage with the GetStakingContext API because of a recent addition of pending_claimable_balance

Error:

>> go run examples/ethereum/dedicated-eth-stake/main.go /Users/rohit/code/cb/staking/.coinbase_cloud_api_key_production.json 0xdb816889F2a7362EF242E5a717dfD5B38Ae849FE
2025/02/05 06:42:11 error getting stakeable balance: APIError{Code: unknown, Message: json: unknown field "pending_claimable_balance"}

I need to dig deeper into our client generation code, to see why this broke the SDK but for doing a forward-fix by updating the client with latest generated code fixes the issue and unblocks a customer.

2. Fixes a small typo in example script.

Qualified Impact

[cb-heimdall]

✅ Heimdall Review Status

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Reviews	✅ 1/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1