MAINTAINERS: Fix errors reported by get_maintainer.py
MAINTAINERS: Fix errors reported by get_maintainer.py

There are two issues in MAINTAINERS.yml.

tests/subsys/fs/littlefs/ specified under Little FS doesn't have the
trailing slash (/).

The commit 0eaa495ccbe1a7c4680fd637c38042fa0c6df7a9 renamed
samples/drivers/CAN to can but MAINTAINERS.yml wasn't.

Signed-off-by: Yasushi SHOJI <14ec53d32a78856b2f694de3f555fb26317096b4@gmail.com>

Vudentz/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,nashif/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,nashif/zephyr,Vudentz/zephyr,galak/zephyr,nashif/zephyr,finikorg/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,nashif/zephyr,Vudentz/zephyr,Vudentz/zephyr,finikorg/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr