• This change is worth documenting at https://docs.all-hands.dev/
• Include this change in the Release Notes. If checked, you must provide an end-user friendly description for your change below

End-user friendly description of the problem this fixes or functionality that this introduces.

Add documentation checkbox to PR template

Give a summary of what the PR does, explaining any non-trivial design decisions.

This adds a checkbox to let contributors flag a change as worth documenting in the documentation website. This will hopefully allow us to be better at documenting new features and changes.

Link of any specific issues this addresses.

To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:fa83fdd-nikolaik   --name openhands-app-fa83fdd   docker.all-hands.dev/all-hands-ai/openhands:fa83fdd