net: zoap: correct description of zoap_response_received()
net: zoap: correct description of zoap_response_received()

The original description seems copied from zoap_pending_received().
Correct the description to reflect what it does actually

Signed-off-by: Robert Chou <563fc56b80720efb29939356d471536b8c17d514@acer.com>

holtmann/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,mbolivar/zephyr,aceofall/zephyr-iotos,Vudentz/zephyr,fractalclone/zephyr-riscv,Vudentz/zephyr,zephyriot/zephyr,ldts/zephyr,aceofall/zephyr-iotos,rsalveti/zephyr,galak/zephyr,aceofall/zephyr-iotos,kraj/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,punitvara/zephyr,kraj/zephyr,runchip/zephyr-cc3220,aceofall/zephyr-iotos,explora26/zephyr,mbolivar/zephyr,finikorg/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,mbolivar/zephyr,mbolivar/zephyr,fbsder/zephyr,finikorg/zephyr,ldts/zephyr,sharronliu/zephyr,aceofall/zephyr-iotos,rsalveti/zephyr,Vudentz/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,rsalveti/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,sharronliu/zephyr,fbsder/zephyr,runchip/zephyr-cc3220,ldts/zephyr,fractalclone/zephyr-riscv,fractalclone/zephyr-riscv,holtmann/zephyr,nashif/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,holtmann/zephyr,zephyriot/zephyr,fractalclone/zephyr-riscv,nashif/zephyr,sharronliu/zephyr,punitvara/zephyr,punitvara/zephyr,explora26/zephyr,kraj/zephyr,sharronliu/zephyr,rsalveti/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,explora26/zephyr,holtmann/zephyr,zephyriot/zephyr,runchip/zephyr-cc3220,galak/zephyr,holtmann/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,fbsder/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,fbsder/zephyr,runchip/zephyr-cc3220,fbsder/zephyr,Vudentz/zephyr,Vudentz/zephyr,zephyriot/zephyr,nashif/zephyr,zephyriot/zephyr,fractalclone/zephyr-riscv,sharronliu/zephyr,runchip/zephyr-cc3220,zephyrproject-rtos/zephyr,kraj/zephyr,explora26/zephyr,nashif/zephyr,rsalveti/zephyr,mbolivar/zephyr,galak/zephyr