Update missing POOLS_JSON_URL config

backend/src/__tests__/config.test.ts

@@ -36,7 +36,7 @@ describe('Mempool Backend Config', () => {
         USER_AGENT: 'mempool',
         STDOUT_LOG_MIN_PRIORITY: 'debug',
         POOLS_JSON_TREE_URL: 'https://api.github.com/repos/mempool/mining-pools/git/trees/master',
-        POOLS_JSON_URL: 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools.json',
+        POOLS_JSON_URL: 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json',
         AUDIT: false,
         ADVANCED_GBT_AUDIT: false,
         ADVANCED_GBT_MEMPOOL: false,