fix: metrics port matches IOHK cardano-submit-api

Signed-off-by: Chris Gianelloni <[email protected]>

Author: wolf31o2

internal/config/config.go

@@ -53,7 +53,7 @@ var globalConfig = &Config{
 		ListenAddress:  "",
 		ListenPort:     8090,
 		MetricsAddress: "",
-		MetricsPort:    8091,
+		MetricsPort:    8081,
 	},
 	Debug: DebugConfig{
 		ListenAddress: "localhost",