Fix typo in uname command in start-configuration

[pgcudahy]

#3601 modified a call to the uname command. Now when $DEBUG_MEMORY=true it throws an error

[init] 2025-08-27 15:05:48+02:00 Memory usage and availability (in MB)
+ uname -parts
uname: invalid option -- 't'
Try 'uname --help' for more information.

I assume the -t switch is a typo since it's not available in any uname implementation I'm aware of. I removed it.

[itzg]

Thanks! Yeah I guess previous versions were quietly ignoring the invalid option.