Fix grammar mistake in long package description.

debian/control

@@ -19,6 +19,6 @@ Description: Extra profiles for AppArmor Security policies
  This package provides various AppArmor profiles that are not shipped in
  the upstream AppArmor releases.
  .
- In the future, when AppArmor will be enabled by default in Debian, this
+ In the future, when AppArmor is enabled by default in Debian, this
  package shall become obsolete again, as all its profiles will move into
  the packages they provide confinement for.