Fix syntax issue

Author: normj

buildtools/ci.buildspec.yml

@@ -10,6 +10,7 @@ phases:
     commands:
       - curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --channel 10.0
       - dotnet --version
+  build:
     commands:
       - dotnet test --verbosity normal test/Amazon.Common.DotNetCli.Tools.Test/Amazon.Common.DotNetCli.Tools.Test.csproj --configuration Release --logger trx --results-directory ./testresults
       - dotnet test --verbosity normal test/Amazon.ECS.Tools.Test/Amazon.ECS.Tools.Test.csproj --configuration Release --logger trx --results-directory ./testresults