Updated to version 5.1

Added second new visual speed type display
Renamed Config.Config to Config.config (Private variable)
Renamed Config.config to Config.ConfigFile (Local variable)
Added red triangle to the discouraged visual speed type display
Cleaned up some code
Added credits to org.json to readme.md

gradle.properties

@@ -3,7 +3,7 @@ org.gradle.jvmargs=-Xmx8G
 minecraft_version=1.20.1
 
 archives_base_name=speedometer
-mod_version=5
+mod_version=5.1
 maven_group=me.zacharias
 
 architectury_version=9.1.10