Following the correct syntax for dotnet command (#1213)

Co-authored-by: Aniruddh Munde <[email protected]>

Author: abhishekkumams

docs/getting-started/getting-started.md

@@ -33,7 +33,7 @@ Data API Builder provides a CLI tool to simplify configuration and execution of
 then, to install this tool globally, use:
 
 ```bash
-dotnet tool install Microsoft.DataApiBuilder --global --version <version_number>
+dotnet tool install --global Microsoft.DataApiBuilder --version <version_number>
 ```
 
 or, if you have already installed a previous version, you can update DAB CLI to the latest version via the following: