Update install_locally to match the directory created in prepare_build_environment

The directory mentioned in install_locally doesn't match the one mentioned in prepare_build_environment.

This commit fixes this.

Author: bblacher

getting_started/setup_linux/install_locally.rst

@@ -16,7 +16,7 @@ Make sure you have `set up your development environment <prepare_build_environme
 Build and install the kernel
 ****************************
 
-1. Change directory to ``~/sof/linux`` that you created on the setup page.
+1. Change directory to ``~/work/sof/linux`` that you created on the setup page.
 
 #. Load the base kernel configuration.