Update Upgrading Guide.md
Update Upgrading Guide.md

Since 0.9.x shouldn't even be functional anymore, I removed it and updated it for migrating from 1.3x and older.
shikhir-arora/NadekoBot,Nielk1/NadekoBot,Taknok/NadekoBot,gfrewqpoiu/NadekoBot,WoodenGlaze/NadekoBot,halitalf/NadekoMods,ScarletKuro/NadekoBot,ShadowNoire/NadekoBot,PravEF/EFNadekoBot,Blacnova/NadekoBot