Update cosmwasm-std requirement from 1.5.3 to 2.0.3

Updates the requirements on [cosmwasm-std](https://github.com/CosmWasm/cosmwasm) to permit the latest version.
- [Release notes](https://github.com/CosmWasm/cosmwasm/releases)
- [Changelog](https://github.com/CosmWasm/cosmwasm/blob/v1.5.5/CHANGELOG.md)
- [Commits](CosmWasm/cosmwasm@v1.5.3...v1.5.5)

---
updated-dependencies:
- dependency-name: cosmwasm-std
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -14,7 +14,7 @@ panic = 'abort'
 incremental = false
 
 [workspace.dependencies]
-cosmwasm-std = { version = "1.5.3" }
+cosmwasm-std = { version = "2.0.3" }
 cosmwasm-schema = { version = "1.5.3" }
 cw-controllers = { version = "1.1.2" }
 cw-storage-plus = "1.2.0"