message: Correct URL to MacOS build guide
diff: @@ -113,7 +113,7 @@ it should finish successfully.
  To build libvcx on your own you can follow these steps --
  1) Install rust and rustup (https://www.rust-lang.org/install.html).
  2) Install or build libindy (https://repo.evernym.com/libindy/).
  - - As of now there is no distribution channel for OSX for LibIndy. [You have to build it manually.](https://github.com/hyperledger/indy-sdk/blob/master/docs/source/build-guides/mac-build.md)
  + - As of now there is no distribution channel for OSX for LibIndy. [You have to build it manually.](https://github.com/hyperledger/indy-sdk/blob/master/docs/build-guides/mac-build.md)
  - Copy generated `libindy.dylib` file to `/usr/local/lib`
  - Or create a symlink in `/usr/local/lib` pointing to newly generated `libindy.dylib`, this will help in updating the libindy in future.
  3) Clone this repo to your local machine.
  