Update abstract_mainnet.json

add usdc to abstract

Author: KemarTiti

pages/price-feeds/core/push-feeds/data/evm/abstract_mainnet.json

@@ -13,6 +13,13 @@
     "price_deviation": 1,
     "confidence_ratio": 100
   },
+  {
+    "alias": "USDC/USD",
+    "id": "eaa020c61cc479712813461ce153894a96a6c00b21ed0cfc2798d1f9a9e9c94a",
+    "time_difference": 3600,
+    "price_deviation": 1,
+    "confidence_ratio": 100
+  },
   {
     "alias": "PENGU/USD",
     "id": "bed3097008b9b5e3c93bec20be79cb43986b85a996475589351a21e67bae9b61",