Update pc-requirements.md

docs/pc-requirements.md

@@ -12,7 +12,7 @@
 
 ## Other considerations
 
--   The monitor must be flicker-free (no PWM) to preserve the student's attention & eye health
+-   The monitor must be flicker-free (no PWM) to preserve the student's attention & eye health.
 -   To avoid damaging the PC ports, all cables (USB, Audio) must be connected to cheaper and easier to replace extension cables.
--   Energy consumption is an important criterion to be taken into account
--   It is better to buy computer without a Windows licence, as it is an unnecessary extra cost.
+-   Energy consumption is an important criterion to be taken into account.
+-   It is better to buy the computers without a Windows licence, as it is an unnecessary extra cost.