Fix issue with removed message

[thevops]

When the last message from the thread has been removed by user, the bot will fail with:

DiscordAPIError: Unknown Message
    at RequestHandler.execute (/discord-bot/node_modules/discord.js/src/rest/RequestHandler.js:350:13)	
    at processTicksAndRejections (node:internal/process/task_queues:96:5)	
    at async RequestHandler.push (/discord-bot/node_modules/discord.js/src/rest/RequestHandler.js:51:14)	
    at async MessageManager._fetchId (/discord-bot/node_modules/discord.js/src/managers/MessageManager.js:219:18)	
    at async /discord-bot/cron/thread-lifecycle.js:60:33 {	
  method: 'get',	
  path: '/channels/123123123/messages/456456456',	
  code: 10008,	
  httpStatus: 404,	
  requestData: { json: undefined, files: [] }	
}

This PR is tagged with v1.0.1-rc2