Fix: nodejs.org/learn leads to 404 (nodejs#7001)

Fixes 7000

Author: Nirmalkumar6112

apps/site/redirects.json

@@ -264,6 +264,10 @@
       "source": "/:locale/get-involved/:path*",
       "destination": "/:locale/about/get-involved/:path*"
     },
+    {
+      "source": "/learn",
+      "destination": "/en/learn"
+    },
     {
       "source": "/:locale/learn",
       "destination": "/:locale/learn/getting-started/introduction-to-nodejs"