build: fix README.md reference after rename
authorAdrian Schmutzler <freifunk@adrianschmutzler.de>
Wed, 12 Aug 2020 11:42:33 +0000 (13:42 +0200)
committerAdrian Schmutzler <freifunk@adrianschmutzler.de>
Wed, 12 Aug 2020 12:03:17 +0000 (14:03 +0200)
commit751486b31fd9b6fb489bc419d27a13460ade23e1
tree8146b7a77d1d360a4003abf4fa2c7f6d19b5d471
parent151e43df7a9bc364080bd13402d81c17d4c8ba7e
build: fix README.md reference after rename

The README file is displayed on "make help", but updating the
command has been overlooked during the README -> README.md
rename.

Fix it.

Fixes: d0113711a31f ("README: port to 21st century")
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
include/toplevel.mk