[doc] spelling fixes

doc/install.rst

@@ -377,8 +377,8 @@ currently available filters include:
    has a pixel-size setting that is used to set the effective downscaling ratio,
    and a configurable interpolation algorithm.
 
--  AMD FidelityFX Super Resolution (FSR): A spatial upcaling filter that works 
-   on low resolution frames from the guest VM and intelligently upscales to a 
+-  AMD FidelityFX Super Resolution (FSR): A spatial upscaling filter that works
+   on low resolution frames from the guest VM and intelligently upscales to a
    higher resolution. The filter sharpness is tunable, and displays the
    equivalent AMD quality mode based on the resolution difference.
 

doc/words.txt

@@ -29,6 +29,7 @@ modprobe
 msys
 multisampling
 Nvidia
+overlayed
 pacman
 passthrough
 pre
@@ -38,11 +39,13 @@ radeon
 realtime
 renderer
 repo
+runtime
 submodule
 submodules
 systemd
 toolchain
 tritanope
+tunable
 udev
 UEFI
 uncheck
@@ -51,6 +54,7 @@ Unigine
 unix
 upscaled
 upscaler
+upscales
 upscaling
 VM
 vsync