Update 2_additional_settings.md (#2016)

Author: 97tuna

doc/installation/2_additional_settings.md

@@ -75,7 +75,7 @@ By default, the body `COCO` and `MPI` models are not downloaded (they are slower
 ### 3D Reconstruction Module
 You can include the 3D reconstruction module by:
 
-1. Install the FLIR camera software, Spinnaker SDK. It is a propietary software, so we cannot provide direct download link. Note: You might skip this step if you intend to use the 3-D OpenPose module with a different camera brand.
+1. Install the FLIR camera software, Spinnaker SDK. It is a proprietary software, so we cannot provide direct download link. Note: You might skip this step if you intend to use the 3-D OpenPose module with a different camera brand.
     1. Ubuntu: Get and install the latest Spinnaker SKD version in their default path. OpenPose will automatically find it. Otherwise, set the right path with CMake.
     2. Windows: Donwload the latest Spinnaker SKD version from [https://www.ptgrey.com/support/downloads](https://www.ptgrey.com/support/downloads).
         - Copy `{PointGreyParentDirectory}\Point Grey Research\Spinnaker\bin64\vs2015\` as `{OpenPoseDirectory}\3rdparty\windows\spinnaker\bin\`. You can remove all the *.exe files.