fix: Make sure the log.txt file exists during release pipeline (#398)

Co-authored-by: Pim Simons <[email protected]>

build/psgallery-release.yml

@@ -151,6 +151,7 @@ stages:
             inputs:
               checkLatest: true
           - powershell: |
+              New-Item log.txt
               Get-ChildItem -Path $env:ARTIFACT_DIR -Filter *.nupkg -Recurse |
                 % { & "nuget" push $_.FullName -Source $(Source) -ApiKey $(NuGet.ApiKey) -SkipDuplicate | Out-File log.txt -Append }