Pass runners.config through the template engine (tpl)

If you change https://gitlab.com/gitlab-org/charts/gitlab-runner/-/blob/master/templates/configmap.yaml#L71 to {{ tpl .Values.runners.config $ | indent 2 }} then I can use others helm variables in this config, thanks in advance!

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information