Update main.yml

don't run tests if we don't have a token

.github/workflows/main.yml

@@ -24,7 +24,7 @@ jobs:
 
       - name: Run tests
         # Tests need access to secrets, so we can't run them against PRs because of limited trust
-        if: ${{ github.event_name != 'pull_request' }}
+        if: ${{ github.event_name != 'pull_request' && env.DISCORD_TOKEN != '' }}
         run: >
           dotnet test
           --configuration Release
@@ -149,4 +149,4 @@ jobs:
             {
               "avatar_url": "https://raw.githubusercontent.com/${{ github.event.repository.full_name }}/${{ github.ref_name }}/favicon.png",
               "content": "**${{ github.event.repository.name }}** new version released!\nVersion: `${{ github.ref_name }}`\nChangelog: <${{ github.event.repository.html_url }}/blob/${{ github.ref_name }}/Changelog.md>"
-            }
+            }