fix: update reserve snapshot to add unbacked field

Author: juangm

packages/spec/markets/__snapshots__/reserve.spec.ts.snap

@@ -17,6 +17,7 @@ exports[`Given an Aave Market reserve > When fetching the reserve data > Then it
   "permitSupported": false,
   "size": Any<Object>,
   "supplyInfo": Any<Object>,
+  "unbacked": Any<Object>,
   "underlyingToken": {
     "__typename": "Currency",
     "address": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",

packages/spec/markets/reserve.spec.ts

@@ -52,6 +52,7 @@ describe('Given an Aave Market reserve', () => {
         usdExchangeRate: expect.any(String),
         vToken: expect.any(Object),
         supplyInfo: expect.any(Object),
+        unbacked: expect.any(Object),
         borrowInfo: expect.any(Object),
         eModeInfo: expect.any(Array),
         market: expect.any(Object),