.github/workflows/guile3.0.yml: Fix the artifact name

Author: artyom-poptsov

.github/workflows/guile3.0.yml

@@ -47,6 +47,6 @@ jobs:
         id: upload-artifact
         uses: actions/upload-artifact@v4
         with:
-          name: guile-png
+          name: guile-smc
           compression-level: 0
           path: "guile-smc-*.tar.gz"