Should we just give up our bond instead of repairing a garage door?

Hi! So my partner and I recently bought our first home and are moving out of our rental of 2 years. There is this small dent on the garage door that my partner caused about a year ago and we forgot about it. The landlord saw it and wants it repaired/replaced. I've just spoken with the people who originally installed the door 4 years ago and they said that it'll probably cost more than our bond.

Hence the question. Should we just give our bond up? What are the consequences for doing this? Would they be able to make us pay more? I've attached some pictures of the damage.

The landlord has been really nice throughout our rental period and even with the lease break. There's already a new tenant coming in january. This is the only thing that I don't really want to pay for to be done.