Is your feature request related to a problem? Please describe.

Multiple MMU2S owners have been having issues with the new 3.0.0 MMU firmware (not to be confused with the MMU3 hardware) that require sending either M708 A0x19 X5, M708 A0x19 X6, or M708 A0x19 X7 to the printer to troubleshoot/fix.

By default OctoPrint will auto capitalize the x in A0x19.

Describe the solution you'd like

Add the M708 command to the default autoUppercaseBlacklist located here:

Describe alternatives you've considered

Other alternatives involve using the Arduino IDE or updating the already-installed OctoPrint configuration to include this command.

Additional context

No response