chore(ci): disable discord notifications for pre-release versions (#1132)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: roflmuffin <[email protected]>

Author: Copilot

.github/workflows/build-and-publish.yml

@@ -258,6 +258,7 @@ jobs:
           dotnet nuget push build/api/CounterStrikeSharp.API.${{ needs.setup.outputs.gitversion_semver }}.snupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
 
       - name: Send Notification to Discord
+        if: ${{ !contains(github.ref_name, '-alpha') && !contains(github.ref_name, '-beta') && !contains(github.ref_name, '-rc') }}
         env:
           DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
         uses: Ilshidur/[email protected]