Add info about passthrough-motd issues

[OstlerDev]

Currently there is an issue where if your MOTD is either too long, or uses special characters, that the Bedrock client cannot connect. This adds instructions for users to try disabling this setting to see if it helps.

My MOTD was extremely long and had both emojis and a lot of color formatting. When I disabled passthrough-motd I was able to successfully connect!