sanitycheck_tests.yml: Add itself to path filter
sanitycheck_tests.yml: Add itself to path filter

So build is run when sanitycheck_tests.yml is changed.

Signed-off-by: Øyvind Rønningstad <5f9e1eedbdafebd99226f1498f634e1047455d88@nordicsemi.no>

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