Remove extra newline at the end of the file (#806)

Co-authored-by: Sima Zhu <sizhu@microsoft.com>

eng/common/scripts/copy-docs-to-blobstorage.ps1

@@ -208,7 +208,7 @@ function Upload-Blobs
             $fileContent = Get-Content -Path $htmlFile -Raw
             $updatedFileContent = $fileContent -replace $RepoReplaceRegex, "`${1}$ReleaseTag"
             if ($updatedFileContent -ne $fileContent) {
-                Set-Content -Path $htmlFile -Value $updatedFileContent
+                Set-Content -Path $htmlFile -Value $updatedFileContent -NoNewLine
             }
         }
     }