message: Update contributing guide for vcpkg steps
diff: @@ -65,7 +65,7 @@ Follow [vcpkg install guide](https://github.com/microsoft/vcpkg#getting-started)
  ./vcpkg install curl libxml2
  ```
  -When using vcpkg, make sure to set the `VCPKG_ROOT` environment variable to the vcpkg Git repository folder before using `CMake`.
  +When using vcpkg, you can set the `VCPKG_ROOT` environment variable to the vcpkg Git repository folder. This would automatically set the CMake variable `CMAKE_TOOLCHAIN_FILE` for you, enabling the project to use any library installed with vcpkg.
  The Azure SDK for C++ uses [this vcpkg release version](https://github.com/Azure/azure-sdk-for-cpp/blob/master/eng/vcpkg-commit.txt) for continuos integration (CI) building and testing. Make sure to checkout this version when following the next steps for building and running the Azure SDK for C++. Using a newer vcpkg version might still work, however, if it is tested.
  @@ -85,8 +85,7 @@ git checkout <vcpkg commit>
  ### Building and Testing
  #### Building the project
  -First, ensure that the `VCPKG_ROOT` environment variable is set, as described [above](#vcpkg). This needs to be defined
  -any time you want to build using vcpkg. Then generate the build files and build as you would with any standard CMake project. From the
  +Generate the CMake files and build as you would with any standard CMake project. From the
  repo root, run:
  ```sh
  