Update tx timeout example value

Author: tsudmi

README.md

@@ -105,7 +105,7 @@ BALANCE_WARNING_THRESHOLD=0.05
 BALANCE_ERROR_THRESHOLD=0.008
 APPLY_GAS_PRICE_STRATEGY=True
 MAX_TX_WAIT_SECONDS=180
-TRANSACTION_TIMEOUT=3600
+TRANSACTION_TIMEOUT=10800
 PROCESS_INTERVAL=30
 ORACLES_CONTRACT_ADDRESS=0x2f1C5E86B13a74f5A6E7B4b35DD77fe29Aa47514
 POOL_CONTRACT_ADDRESS=0xC874b064f465bdD6411D45734b56fac750Cda29A