Hey Tennousu,
This is quite safe, I did this with my MacBook Pro. In fact, it's safer to reduce the maximum state rather than to increase it, as heat can be quite an issue. Not only it reduces the life of your fan bearings (like the intake and exhaust fans in your laptop) and motor, it's also not so healthy for the CPU (and even the GPU) to be hot all the time, it also ages rather rapidly. Keep it at lower temperatures and you should be golden, you probably should invest in a cooling pad to further accomplish this.
Let me know if you have any additional questions about this, but I hope this helps.
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.