MAINTAINERS: correct the path of UEFI docs

Change the path from doc/uefi to doc/develop/uefi.

Fixes: commit d1ceeeff6c2e ("doc: Move UEFI under develop/")
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index a6b49b5..ae6c708 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -695,7 +695,7 @@
 S:	Maintained
 T:	git https://source.denx.de/u-boot/custodians/u-boot-efi.git
 F:	doc/api/efi.rst
-F:	doc/uefi/*
+F:	doc/develop/uefi/*
 F:	doc/usage/bootefi.rst
 F:	drivers/rtc/emul_rtc.c
 F:	include/capitalization.h