message: Update compatibility table for CosmWasm 0.16
diff: @@ -16,7 +16,8 @@ compatibility list:
  | cosmwasm-vm | Supported interface versions | cosmwasm-std |
  | ----------- | ---------------------------- | ------------ |
  -| 1.0 | `interface_version_7` | 1.0 |
  +| 1.0 | TBD | 1.0 |
  +| 0.16 | `interface_version_7` | 0.16 |
  | 0.15 | `interface_version_6` | 0.15 |
  | 0.14 | `interface_version_5` | 0.14 |
  | 0.13 | `cosmwasm_vm_version_4` | 0.11-0.13 |
  