feat: bump Cosmos SDK from v0.44.1 to v0.44.2

[dongsam]

Summary

As https://github.com/cosmos/gaia/pull/979 plans to use Cosmos SDK v0.44.2, we also need to bump SDK from v0.44.1 to v0.44.2.

References

• https://github.com/cosmos/gaia/pull/979#issuecomment-936272260
• https://github.com/cosmos/cosmos-sdk/releases/tag/v0.44.2