I use nrf52832 on my own board, and I don't know how to update the J-Link OB bin file to nrf52832. I want to use j-link OB for debugging.
Your question doesn't make much sense. You don't update the JLink OB software to the nRF52832, it runs on the separate debugging chip (an Atmel) on the development kit.
You can use the DK to program your custom board, but you don't put the OB software on your board, you just connect up SWDCLK,SWDIO,VCC and GND and it will program through to your board ... or you buy a segger which can be fairly cheap.