Fix spell error in configuration.rst

It should be 'location of your accounts.yaml', rather than
'location of you accounts.yaml'.

Change-Id: I2c3abf9fd3eefccb6dbbe8d3a7865a1c4966c4dd
diff --git a/doc/source/configuration.rst b/doc/source/configuration.rst
index eab7487..0805544 100644
--- a/doc/source/configuration.rst
+++ b/doc/source/configuration.rst
@@ -112,7 +112,7 @@
     available in the file. (if running serially the worker count is 1)
 
     You can check the sample file packaged in tempest for the yaml format
- #. Provide tempest with the location of you accounts.yaml file with the
+ #. Provide tempest with the location of your accounts.yaml file with the
     test_accounts_file option in the auth section
 
  #. Set allow_tenant_isolation = False in the auth group