docs/manual/adding-packages-linux-kernel-spec-infra.adoc: fix information typo

Plural of information is also information.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit c88a61759981562a85cb6a45b9db945ef6ccfa1e)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

docs/manual/adding-packages-linux-kernel-spec-infra.adoc

@@ -107,7 +107,7 @@ Let's look at an example on how to add a new Linux extension +foo+.
 First, create the package +foo+ that provides the extension: this
 package is a standard package; see the previous chapters on how to
 create such a package. This package is in charge of downloading the
-sources archive, checking the hash, defining the licence informations
+sources archive, checking the hash, defining the licence information
 and building user space tools if any.
 
 Then create the 'Linux extension' proper: create a new menu entry in