Update ecosystem.yml

Author: FCO

.github/workflows/ecosystem.yml

@@ -12,7 +12,7 @@ jobs:
       image: fernandocorrea/red-tester-no-run
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
       - name: raku -v
         run: raku -v
       - name: Install Red