bump chainlink node version

Author: dev-dist

public/changelog.json

@@ -772,6 +772,13 @@
       "title": "CCIP Expands to Tempo Testnet",
       "topic": "CCIP"
     },
+    {
+      "category": "release",
+      "date": "2023-12-11",
+      "description": "Chainlink Node v2.3.1 is now available. See the [Release Notes](https://github.com/smartcontractkit/chainlink/releases/tag/v2.3.1/) for details.",
+      "title": "Chainlink Node v2.3.1",
+      "topic": "Nodes"
+    },
     {
       "category": "release",
       "date": "2025-12-11",