message: Add missing `-C` flag to `vsts-npm-auth` command.
diff: @@ -22,7 +22,7 @@ Prerequisites: [Node (with npm)](https://nodejs.org) installed
  3. Auth with VSTS using vsts-npm-auth (Windows only, Linux/Mac instructions
  [here](https://docs.microsoft.com/en-us/azure/devops/artifacts/npm/npmrc?view=azure-devops&tabs=windows))
  - `vsts-npm-auth %USERPROFILE%\.npmrc`
  + `vsts-npm-auth -C %USERPROFILE%\.npmrc`
  4. Start installing Fluid packages into your package
  