Fix path bug in DownloadFromResultsContainer.targets

[kunalspathak]

https://github.com/dotnet/arcade/pull/6179/files fixed an issue with downloading helix files, but it was still reproing with following errors (reference dotnet/runtime#59489 (comment)).

D:\workspace\_work\1\s\.packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018: The "DownloadFromResultsContainer" task failed unexpectedly. [D:\workspace\_work\1\s\src\coreclr\scripts\exploratory.proj]
D:\workspace\_work\1\s\.packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018: System.IO.IOException: The filename, directory name, or volume label syntax is incorrect. : 'D:\workspace\_work\1\s\src\coreclr\scripts\$([MSBuild]::NormalizeDirectory('$(BUILD_SOURCESDIRECTORY)', 'artifacts', helixresults'))\9e889cb3-8222-4f97-b8c4-c95ff9d8fa88' [D:\workspace\_work\1\s\src\coreclr\scripts\exploratory.proj]
D:\workspace\_work\1\s\.packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018:    at System.IO.FileSystem.CreateDirectory(String fullPath, Byte[] securityDescriptor) [D:\workspace\_work\1\s\src\coreclr\scripts\exploratory.proj]
D:\workspace\_work\1\s\.packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018:    at System.IO.Directory.CreateDirectory(String path) [D:\workspace\_work\1\s\src\coreclr\scripts\exploratory.proj]
D:\workspace\_work\1\s\.packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018:    at Microsoft.DotNet.Helix.Sdk.DownloadFromResultsContainer.ExecuteCore() in /_/src/Microsoft.DotNet.Helix/Sdk/DownloadFromResultsContainer.cs:line 66 [D:\workspace\_work\1\s\src\coreclr\scripts\exploratory.proj]
D:\workspace\_work\1\s\.packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018:    at Microsoft.DotNet.Helix.Sdk.DownloadFromResultsContainer.Execute() in /_/src/Microsoft.DotNet.Helix/Sdk/DownloadFromResultsContainer.cs:line 58 [D:\workspace\_work\1\s\src\coreclr\scripts\exploratory.proj]
D:\workspace\_work\1\s\.packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [D:\workspace\_work\1\s\src\coreclr\scripts\exploratory.proj]
D:\workspace\_work\1\s\.packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [D:\workspace\_work\1\s\src\coreclr\scripts\exploratory.proj]
##[error].packages\microsoft.dotnet.helix.sdk\7.0.0-beta.21463.4\tools\download-results\DownloadFromResultsContainer.targets(24,5): error MSB4018: (NETCORE_ENGINEERING_TELEMETRY=Build) The "DownloadFromResultsContainer" task failed unexpectedly.
System.IO.IOException: The filename, directory name, or volume label syntax is incorrect. : 'D:\workspace\_work\1\s\src\coreclr\scripts\$([MSBuild]::NormalizeDirectory('$(BUILD_SOURCESDIRECTORY)', 'artifacts', helixresults'))\9e889cb3-8222-4f97-b8c4-c95ff9d8fa88'
   at System.IO.FileSystem.CreateDirectory(String fullPath, Byte[] securityDescriptor)
   at System.IO.Directory.CreateDirectory(String path)
   at Microsoft.DotNet.Helix.Sdk.DownloadFromResultsContainer.ExecuteCore() in /_/src/Microsoft.DotNet.Helix/Sdk/DownloadFromResultsContainer.cs:line 66
   at Microsoft.DotNet.Helix.Sdk.DownloadFromResultsContainer.Execute() in /_/src/Microsoft.DotNet.Helix/Sdk/DownloadFromResultsContainer.cs:line 58
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask)


```

Looks like there was a surrounding `'` that should not be there.

[kunalspathak]

@safern

[kunalspathak]

@safern - can this be merged or we need more approvals?