Update netlify.toml

Author: vfdev-5

netlify.toml

@@ -75,6 +75,12 @@ HUGO_ENV = "production"
   status = 301
   force = true
 
+[[redirects]]
+  from = "/playground"
+  to = "https://mybinder.org/v2/gh/pytorch-ignite/playground/HEAD?labpath=index.ipynb"
+  status = 301
+  force = true
+
 [[redirects]]
   from = "/*"
   to = "/404.html"