MAINTAINERS: add the VFS git tree

The VFS git tree is missing from MAINTAINERS.  Add it.

Signed-off-by: Eric Biggers <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Brauner <[email protected]>

Author: ebiggers

MAINTAINERS

@@ -8597,6 +8597,7 @@ M:	Christian Brauner <[email protected]>
 R:	Jan Kara <[email protected]>
 L:	[email protected]
 S:	Maintained
+T:	git https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
 F:	fs/*
 F:	include/linux/fs.h
 F:	include/linux/fs_types.h