Fix title case

Author: nathan-contino

documentation/asciidoc/computers/getting-started/setting-up.adoc

@@ -56,7 +56,7 @@ image::images/peripherals/cable-power.png[alt="Plugging a power supply into a Ra
 Plug your power supply into the port marked "POWER IN", "PWR IN", or "PWR". Some Raspberry Pi models, such as the Zero series, have output USB ports with the same form factor as the power port. Be sure to use the correct port on your Raspberry Pi!
 
 [[sd-cards]]
-=== Boot Media
+=== Boot media
 
 Raspberry Pi models lack onboard storage, so you have to supply it. You can boot your Raspberry Pi from an operating system image installed on any supported media: microSD cards are used commonly, but USB storage, network storage, and storage connected via a PCIe HAT are also available. However, only recent Raspberry Pi models support all of these media types.