Update cw2 readme - contract_info key
@@ -23,7 +23,7 @@ paths.
All CW2-compliant contracts must store the following data:
-* key: `\x00\x0dcontract_info` (length prefixed "contract_info" using Singleton pattern)
+* key: `contract_info`
* data: Json-serialized `ContractVersion`
```rust
