Merge pull request #599 from santhoshb-msft/sb-dotnet6

added dotnet 6.0 to the installation script

docs/Installation-Instructions.md

@@ -29,9 +29,9 @@ Copy the following section to an editor and update it to match your company pref
 ``` powershell
 wget https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh; `
 chmod +x dotnet-install.sh; `
-./dotnet-install.sh; `
+./dotnet-install.sh --channel 6.0; `
 $ENV:PATH="$HOME/.dotnet:$ENV:PATH"; `
-dotnet tool install --global dotnet-ef; `
+dotnet tool install --global dotnet-ef --version 6.0.1; `
 git clone https://github.com/Azure/Commercial-Marketplace-SaaS-Accelerator.git -b 7.4.0 --depth 1; `
 cd ./Commercial-Marketplace-SaaS-Accelerator/deployment; `
 .\Deploy.ps1 `