deps: bump cometbft to 0.38.4 in modules.

[DimitrisJim]

Description

closes: #XXXX

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[DimitrisJim]

seems cometbft 0.38.3 changed an interface that made the cosmossdk version we depend on not compilable:

cosmos-sdk@v0.50.3/server/cmt_cmds.go:443:7: cannot use blockStoreDB (variable of type "github.com/cometbft/cometbft-db".DB) as "github.com/cometbft/cometbft-db".Batch value in argument to store.SaveBlockStoreState: "github.com/cometbft/cometbft-db".DB does not implement "github.com/cometbft/cometbft-db".Batch (missing method Write)) (typecheck)

[DimitrisJim]

might need to hold off on this one.

[crodriguezvega]

yes, it looks like... Let's wait for an SDK release that upgrades to it. Thanks for bundling the upgrade in a single PR, though.

[DimitrisJim]

bumping to 0.38.4 works out fine!

[crodriguezvega]

Thanks, @DimitrisJim!