meta-asrock: romed8hm3: Correct phosphor-led-manager bbappend filename

Typo in the file name meant it wasn't getting applied.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Change-Id: I112be527fc90c2f85a531d5f0dc6bda1b94cb2e5
diff --git a/meta-asrock/meta-romed8hm3/recipes-phosphor/leds/phosphor-led-manager_%.bbappen b/meta-asrock/meta-romed8hm3/recipes-phosphor/leds/phosphor-led-manager_%.bbappend
similarity index 100%
rename from meta-asrock/meta-romed8hm3/recipes-phosphor/leds/phosphor-led-manager_%.bbappen
rename to meta-asrock/meta-romed8hm3/recipes-phosphor/leds/phosphor-led-manager_%.bbappend