drivers: gnss: quectel_lcx6g: fix compilation error when CONFIG_PM_DEVICE=y

Fixes a compilation error in quectel_lcx6g driver when CONFIG_PM_DEVICE=y.
Corrects the function call in quectel_lcx6g_suspend from
'modem_chat_run_script_run' to 'modem_chat_run_script'.

Signed-off-by: Pisit Sawangvonganan <pisit@ndrsolution.com>