Problem: recent bug fixes not included

[yihuang]

Solution:

• update ethermint to include two bug fixes
  • fix(rpc): nextBaseFee for fee history (backport: #1720) ethermint#234
  • fix(rpc): align block number input behaviour for eth_getProof (backport: #1772) ethermint#233
• update cosmos-sdk to include one bug fix
  • fix(x/gov): Return ErrInvalidProposalContent in SubmitProposal when legacy handler returns an error. (backport #13051) cosmos/cosmos-sdk#15667

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PR Checklist:

• Have you read the CONTRIBUTING.md?
• Does your PR follow the C4 patch requirements?
• Have you rebased your work on top of the latest master?
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• Have you included tests for any non-trivial functionality?
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• Have you checked your code formatting is correct? (go fmt)
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• If you added any dependencies, have you checked they do not contain any known vulnerabilities? (go list -json -m all | nancy sleuth)
• If your changes affect the client infrastructure, have you run the integration test?
• If your changes affect public APIs, does your PR follow the C4 evolution of public contracts?
• If your code changes public APIs, have you incremented the crate version numbers and documented your changes in the CHANGELOG.md?
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Thank you for your code, it's appreciated! :)

[yihuang]

it seems cosmos-sdk 0.46.12 is about to release, we can wait a little bit for that.