Data: Update changelog for new data items

Author: khadni

.github/scripts/data/baseline.json

@@ -1,5 +1,5 @@
 {
-  "timestamp": "2025-12-28T21:03:24Z",
+  "timestamp": "2026-01-04T21:03:29Z",
   "knownIds": [
   "aptos-apt-usd",
   "aptos-btc-usd",
@@ -1898,6 +1898,7 @@
   "polygon-grt-usd",
   "polygon-hbar-usd",
   "polygon-icp-usd",
+  "polygon-idr-usd",
   "polygon-ils-usd",
   "polygon-ilv-eth",
   "polygon-inr-usd",
@@ -1976,6 +1977,7 @@
   "polygon-yeth-eth-exchange-rate",
   "polygon-yfi-eth",
   "polygon-yfi-usd",
+  "polygon-zar-usd",
   "polygon-zec-usd",
   "polygonkatana-ausd-usd",
   "polygonkatana-btc-usd",