Update stats.yml

Se limita la ejecución a la rama "main"

Author: mouredev

Diff for: .github/workflows/stats.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   build:
-    if: github.repository == 'mouredev/roadmap-retos-programacion'
+    if: github.repository == 'mouredev/roadmap-retos-programacion' && github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
 
     permissions: