chore: use rc3 in release/v0.47.x

[julienrbrt]

Description

Small chore PR to use rc3 in rosetta.
Updating simapp to v0.47.0 so it shows v0.47 when we call version.

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[tac0turtle]

shouldnt this be -rc3?

[julienrbrt]

No because tests and simapp uses a replace, the version we input does not matter. For simapp version to show the proper SDK version, we simply just set the version of the release branch.
For instance, on main it is set to v0.48 (as it's the next version coming).