Fix you -> your

Author: alecbcs

tutorial_environments.rst

@@ -30,7 +30,7 @@ Spack environments are based around two key files that can be easily shared and
 
 * ``spack.yaml`` -- The main configuration file where we specify which packages to install, compilers to use, and other Spack settings.
 
-* ``spack.lock`` -- A lockfile that captures the complete provenance of you environment, enabling reproduction of software environments.
+* ``spack.lock`` -- A lockfile that captures the complete provenance of your environment, enabling reproduction of software environments.
 
 ---------------------
 Why Use Environments?