Typo fix

"Secret" should be plural "Secrets" in this context.

Author: andyexeter

best_practices.rst

@@ -88,7 +88,7 @@ application behavior.
 :ref:`Use env vars in your project <config-env-vars>` to define these options
 and create multiple ``.env`` files to :ref:`configure env vars per environment <config-dot-env>`.
 
-Use Secret for Sensitive Information
+Use Secrets for Sensitive Information
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 When your application has sensitive configuration - like an API key - you should