Update chapter03-presenting-users.adoc (#80)

* Update chapter03-presenting-users.adoc

Fix: Use correct password_digest field in test code.
Fix: Typo.

* Update chapter03-presenting-users.adoc

Fix: Commit message for update action.

Author: ForerunnerG34

rails6/en/chapter03-presenting-users.adoc

@@ -614,7 +614,7 @@ We do a commit Since everything works:
 
 [source,bash]
 ----
-$ git commit -am "Adds update action the users controller"
+$ git commit -am "Adds update action to the users controller"
 ----
 
 === Delete the user