doc: update default etcdir exposed

Author: xdelaruelle

doc/source/conf.py

@@ -219,7 +219,7 @@ def get_version_release_from_git():
     prefix = '/usr/share/Modules'
     bindir = prefix + '/bin'
     libexecdir = prefix + '/libexec'
-    etcdir = prefix + '/etc'
+    etcdir = '/etc/environment-modules'
     initdir = prefix + '/init'
     modulefilesdir = prefix + '/modulefiles'