MAINTAINERS: add entry for Documentation/admin-guide/reporting-issues.rst

Thorsten will keep an eye on the new document about reporting issues
(aka bugs).
Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Link: https://lore.kernel.org/r/c8d55ec74d104b90fdb9c155bca3b407e8480fb3.1617113469.git.linux@leemhuis.infoSigned-off-by: Jonathan Corbet <corbet@lwn.net>

MAINTAINERS

@@ -5413,6 +5413,12 @@ X:	Documentation/power/
 X:	Documentation/spi/
 X:	Documentation/userspace-api/media/
 
+DOCUMENTATION REPORTING ISSUES
+M:	Thorsten Leemhuis <linux@leemhuis.info>
+L:	linux-doc@vger.kernel.org
+S:	Maintained
+F:	Documentation/admin-guide/reporting-issues.rst
+
 DOCUMENTATION SCRIPTS
 M:	Mauro Carvalho Chehab <mchehab@kernel.org>
 L:	linux-doc@vger.kernel.org