how to edit gitlab-runner's config.toml file?

when I wanted to edit config.toml file,

I had to enter the container's commond and edited /etc/gitlab-runner/config.toml file .

I have multi gitlab-runner,so I had to edit every gitlab-runner's container's /etc/gitlab-runner/config.toml file.

I did it right ?

I also made the config.toml's file add to the volume,but it didn't work.

do you have a good way to do that ?