Replace MATIC ticker by POL

Author: vforgeoux-ledger

makefile_conf/chain/polygon.mk

@@ -1,4 +1,4 @@
 PATH_APP_LOAD_PARAMS += "44'/60'"
-TICKER = "MATIC"
+TICKER = "POL"
 CHAIN_ID = 137
 APPNAME = "Polygon"

src/network.c

@@ -38,7 +38,7 @@ static const network_info_t NETWORK_MAPPING[] = {
     {.chain_id = 99, .name = "POA", .ticker = "POA"},
     {.chain_id = 100, .name = "Gnosis", .ticker = "xDAI"},
     {.chain_id = 106, .name = "Velas EVM", .ticker = "VLX"},
-    {.chain_id = 137, .name = "Polygon", .ticker = "MATIC"},
+    {.chain_id = 137, .name = "Polygon", .ticker = "POL"},
     {.chain_id = 196, .name = "OKBChain Mainnet", .ticker = "OKB"},
     {.chain_id = 199, .name = "BTTC", .ticker = "BTT"},
     {.chain_id = 246, .name = "EnergyWebChain", .ticker = "EWT"},