message: [doc] Add v0.9.2 release notes.
diff: @@ -9,7 +9,7 @@ A Layered Cryptocurrency and Decentralized Blockchain System.
  ## Build from source
  ```shell
  -cargo build
  +cargo build --release
  ```
  For prerequisites and detailed build instructions please read [Build from source](http://developer.starcoin.org/en/build/) document.
  