README: add chmod for RAPL instructions

Forgot to add `chmod o+r` to set attributes

README.md

@@ -199,7 +199,7 @@ Because comma is also used as option delimiter and needs to be escaped for value
 
 Note: Width and Height are set automatically based on the font_size, but can be overridden.
 
-Note: RAPL is currently used for Intel CPUs to show power draw with `cpu_power` which may be unreadable for non-root users due to [vulnerability](https://platypusattack.com/). The corresponding `energy_uj` file has to be readable by corrensponding user, e.g. by running `/sys/class/powercap/intel-rapl\:0/energy_uj` as root, else the power shown will be *0 W*, though having the file readable may potentially be a security vulnerability persisting until system reboots.
+Note: RAPL is currently used for Intel CPUs to show power draw with `cpu_power` which may be unreadable for non-root users due to [vulnerability](https://platypusattack.com/). The corresponding `energy_uj` file has to be readable by corrensponding user, e.g. by running `chmod o+r /sys/class/powercap/intel-rapl\:0/energy_uj` as root, else the power shown will be *0 W*, though having the file readable may potentially be a security vulnerability persisting until system reboots.
 ## Vsync
 ### OpenGL Vsync
 - `-1` = Adaptive sync