ci: fix artifacts on libsdl-org repo

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
             --github-variable-prefix platforms \
             --github-ci \
             --verbose \
-            ${{ github.repository_owner != 'libsdl-org' && '--no-artifact' }} \
+            ${{ (github.repository_owner != 'libsdl-org' && '--no-artifact') || '' }} \
             --commit-message-file /tmp/commit_message.txt
   level1:
     needs: [controller]