rgblink linker script format manual doesn't clearly explain that sections should be specified in quotes

[asiekierka]

https://rgbds.gbdev.io/docs/v0.5.2/rgblink.5

The provided words in quotes seem more like comments/explanations. It should be made clear that section names have to be provided in quotes, one per line. Ideally, an example of a well-formed linker script should be provided.