Fix V3114 warnings from PVS-Studio Static Analyzer

[spirifoxy]

I'm a member of the Pinguem.ru competition on finding errors in open source projects. A bug found using PVS-Studio. Warnings: V3114 IDisposable object 'discordBot' is not disposed before method returns. Communicate.cs 256 V3114 IDisposable object 'discordBot' is not disposed before method returns. Communicate.cs 290 V3114 IDisposable object 'discordBot' is not disposed before method returns. Experience.cs 115 V3114 IDisposable object 'discordBot' is not disposed before method returns. MIMHub.cs 368 V3114 IDisposable object 'discordBot' is not disposed before method returns. MIMHub.cs 447