MAINTAINERS: git://github.com -> https://github.com for nilfs2

Github deprecated the git:// links about a year ago, so let's move to the
https:// URLs instead.

Link: https://lkml.kernel.org/r/20221020024255.5000-1-konishi.ryusuke@gmail.com
Link: https://github.blog/2021-09-01-improving-git-protocol-security-github/
Link: https://lkml.kernel.org/r/20221013214638.30933-1-palmer@rivosinc.comSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Reported-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

MAINTAINERS

@@ -14520,7 +14520,7 @@ L:	linux-nilfs@vger.kernel.org
 S:	Supported
 W:	https://nilfs.sourceforge.io/
 W:	https://nilfs.osdn.jp/
-T:	git git://github.com/konis/nilfs2.git
+T:	git https://github.com/konis/nilfs2.git
 F:	Documentation/filesystems/nilfs2.rst
 F:	fs/nilfs2/
 F:	include/trace/events/nilfs2.h