message: Add 0.8 compatibility note
diff: @@ -12,8 +12,9 @@ are compatible with a Cosmos SDK based runtime, [`wasmd`](https://github.com/Cos
  Compatibility:
  +* Contracts built with CosmWasm `v0.8.x` (unreleased) will run on `wasmd` `v0.8.x` (unreleased) (master branch)
  +* Contracts built with CosmWasm `v0.7.x` will run on `wasmd` `v0.7.x` (0.7 branch)
  * Contracts built with CosmWasm `v0.6.3+` will run on `wasmd` `v0.6.x`
  -* Contracts built with CosmWasm `v0.7.x` will run on `wasmd` `v0.7.x`
  ## Overview
  