Update README with avalon temp default.
diff --git a/README b/README
index 51e4d4c..b46059a 100644
--- a/README
+++ b/README
@@ -234,7 +234,7 @@ ASIC and FPGA mining boards (BFL ASIC, BitForce, Icarus, ModMiner, Ztex)
only options:
--avalon-options <arg> Set avalon options baud:miners:asic:timeout:freq
---avalon-temp <arg> Set avalon target temperature (default: 45)
+--avalon-temp <arg> Set avalon target temperature (default: 50)
--bfl-range Use nonce range on bitforce devices if supported
--icarus-options <arg> Set specific FPGA board configurations - one set of values for all or comma separated
--icarus-timing <arg> Set how the Icarus timing is calculated - one setting/value for all or comma separated