ci(release): fix tag existence check for remote

- detect tag by non-empty ls-remote output instead of exit code

.gitea/workflows/release.yml

@@ -53,9 +53,8 @@ jobs:
         run: |
           $version = "${{ steps.extract_version.outputs.version }}"
           $tag = "v$version"
-          git ls-remote --tags origin "refs/tags/$tag" | Out-Null
+          $tagLine = (git ls-remote --tags origin "refs/tags/$tag" | Select-Object -First 1)
-          $tagExists = ($LASTEXITCODE -eq 0)
+          $tagExists = -not [string]::IsNullOrWhiteSpace($tagLine)
-          $global:LASTEXITCODE = 0
           $utf8NoBom = New-Object System.Text.UTF8Encoding($false)
           if ($tagExists) {
             Write-Host "Version $tag already released, stopping job."