message: Update MIGRATING.md with new version number
diff: @@ -4,7 +4,7 @@ This guide explains what is needed to upgrade contracts when migrating over
  major releases of `cosmwasm`. Note that you can also view the
  [complete CHANGELOG](./CHANGELOG.md) to understand the differences.
  -## 1.0.0 -> ?
  +## 1.0.0 -> 1.1.0
  - There are changes to how we generate schemas, resulting in less boilerplace
  maintenance for smart contract devs. The changes are backwards-compatible -
  