MAINTAINERS: add trailing slash to make gerrit add me as reviewer

The trailing slash is required to make gerrit add me on changes for the
whole tree, not just for the directory itself, which obviously would
only change if being deleted or renamed.

This also fixes the behaviour for Felix Singer.

Change-Id: I601aebd4335c7326deca0118725a6f25cec524a9
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47547
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
diff --git a/MAINTAINERS b/MAINTAINERS
index ba88813..9a31a3f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -212,7 +212,7 @@
 M:	Felix Singer <felixsinger@posteo.net>
 M:	Michael Niewöhner <foss@mniewoehner.de>
 S:	Supported
-F:	src/mainboard/clevo
+F:	src/mainboard/clevo/
 
 
 
@@ -401,7 +401,7 @@
 SUPERMICRO X11-LGA1151-SERIES
 M:	Michael Niewöhner <foss@mniewoehner.de>
 S:	Maintained
-F:	src/mainboard/supermicro/x11-lga1151-series
+F:	src/mainboard/supermicro/x11-lga1151-series/
 
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 # Architectures