fix programmatic typo in apt-key manpage

Reported-By: Johannes 'josch' Schauer on IRC
Gbp-Dch: Ignore

doc/apt-key.8.xml

@@ -39,7 +39,7 @@
    <para>
    Note that if usage of <command>apt-key</command> is desired the additional
    installation of the GNU Privacy Guard suite (packaged in
-   <package>gnupg</package>) is required. For this reason alone the programatic
+   <package>gnupg</package>) is required. For this reason alone the programmatic
    usage (especially in package maintainerscripts!) is strongly discouraged.
    Further more the output format of all commands is undefined and can and does
    change whenever the underlying commands change. <command>apt-key</command> will