update: arbos51 notice url

Author: zk-Lumi

…es/arbos51-arbsepolia-upgrade-notice.mdx docs/notices/arbos51-upgrade-notice.mdxdocs/notices/arbos51-arbsepolia-upgrade-notice.mdx renamed to docs/notices/arbos51-upgrade-notice.mdx docs/notices/arbos51-arbsepolia-upgrade-notice.mdx renamed to docs/notices/arbos51-upgrade-notice.mdx

@@ -1488,12 +1488,17 @@
     },
     {
       "source": "/(notices/arbos-50/?)",
-      "destination": "/notices/arbos51-arbsepolia-upgrade-notice",
+      "destination": "/notices/arbos51-upgrade-notice",
       "permanent": false
     },
     {
       "source": "/(notices/arbos-51/?)",
-      "destination": "/notices/arbos51-arbsepolia-upgrade-notice",
+      "destination": "/notices/arbos51-upgrade-notice",
+      "permanent": false
+    },
+    {
+      "source": "/notices/arbos51-arbsepolia-upgrade-notice",
+      "destination": "/notices/arbos51-upgrade-notice",
       "permanent": false
     },
     {