Fix pathes in agent publish step (#4977)

Author: DmitriiBobreshev

.vsts.release.yml

@@ -258,12 +258,14 @@ extends:
                 
                 Get-ChildItem -LiteralPath "$(System.ArtifactsDirectory)/agent" | ForEach-Object {
                   $target=$_
-                  $FullPath = $target.FullName
-                  Get-ChildItem -LiteralPath "$FullPath" -Include "*.zip","*.tar.gz" | ForEach-Object {
+                  $fullPath = $target.FullName
+                  Get-ChildItem -LiteralPath "$fullPath" -Include "*.zip","*.tar.gz" | ForEach-Object {
                     $executable = $_
-                    Write-Host "Uploading $executable to BlobStorage vstsagentpackage/$container/$versionDir"
-                    Set-AzStorageBlobContent -Context $storageContext -Container $container -File "$(System.ArtifactsDirectory)/agent/$target/$executable" -Blob "$versionDir/$executable" -Force
-                    $uploadFiles.Add("/$container/$versionDir/$executable")
+                    $execFullPath = $executable.FullName
+                    $execName = $executable.Name
+                    Write-Host "Uploading $execName to BlobStorage vstsagentpackage/$container/$versionDir"
+                    Set-AzStorageBlobContent -Context $storageContext -Container $container -File "$execFullPath" -Blob "$versionDir/$execName" -Force
+                    $uploadFiles.Add("/$container/$versionDir/$execName")
                   }
                 }
                 Write-Host "Purge Azure CDN Cache"