Use same case for %T (#4313)

Author: danny50610

install/fpm/configuration.xml

@@ -961,9 +961,9 @@
              <literal>strftime(3)</literal> format:
              <literal>%d/%b/%Y:%H:%M:%S %z</literal> (default).
              The <literal>strftime(3)</literal> format must be encapsulated in a
-             <literal>%{&lt;strftime_format&gt;}t</literal> tag, e.g. for a ISO8601
+             <literal>%{&lt;strftime_format&gt;}T</literal> tag, e.g. for a ISO8601
              formatted timestring, use:
-             <literal>%{%Y-%m-%dT%H:%M:%S%z}t</literal>
+             <literal>%{%Y-%m-%dT%H:%M:%S%z}T</literal>
             </entry>
            </row>
            <row>