ci(release): handle missing tag exit code in powershell step

.gitea/workflows/release.yml

@@ -52,13 +52,16 @@ jobs:
         run: |
           $version = "${{ steps.extract_version.outputs.version }}"
           git show-ref --tags --quiet --verify "refs/tags/$version"
-          if ($LASTEXITCODE -eq 0) {
+          $tagExists = ($LASTEXITCODE -eq 0)
+          $global:LASTEXITCODE = 0
+          if ($tagExists) {
             Write-Host "Version $version already released, stopping job."
             "CONTINUE=false" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
           } else {
             Write-Host "Version $version not released yet, continuing workflow..."
             "CONTINUE=true" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
           }
+          exit 0
 
       - name: Run tests
         if: env.CONTINUE == 'true'