NB! It seems this console command is not compatible with CS2.
Command Profile

SV_MAXUPTIMELIMIT

CS:GO

This command sets the maximum amount of time, in hours, that a server can run for before shutting itself down. Default is 0 (no limit).

Syntax
sv_maxuptimelimit [Hours]

Description

This command sets the maximum amount of time, in hours, that a server can run for before shutting itself down. Default is 0 (no limit).

Syntax And Arguments

sv_maxuptimelimit [Hours]
Hours The maximum amount of time, in hours, that the server can run for.