Task 61264952791

doc: Explain that low-effort pull requests may be closed

line	duration	percentage	command
935	18s	33%	`docker buildx build --file=/home/admin/actions-runner/_work/bitcoin/bitcoin/ci/test_imagefile --build-arg=CI_IMAGE_NAME_TAG=mirror.gcr.io/debian:trixie --build-arg=FILE_ENV=./ci/test/00_setup_env_win64.sh --build-arg=BASE_ROOT_DIR=/home/admin/actions-runner/_work/_temp --platform=linux --label=bitcoin-ci-test --tag=ci_win64 --cache-from type=gha,url=http://127.0.0.1:12321/,url_v2=http://127.0.0.1:12321/,scope=ci_win64 --load /home/admin/actions-runner/_work/bitcoin/bitcoin`
1017	5s	9%	docker run --rm --interactive --detach --tty --cap-add=LINUX_IMMUTABLE --mount=type=bind,src=/home/admin/actions-runner/_work/bitcoin/bitcoin,dst=/home/admin/actions-runner/_work/bitcoin/bitcoin,readonly --mount=type=bind,src=/home/admin/actions-runner/_work/_temp/ccache_dir,dst=/home/admin/actions-runner/_work/_temp/ccache_dir --mount=type=bind,src=/home/admin/actions-runner/_work/_temp/depends/built,dst=/home/admin/actions-runner/_work/_temp/depends/built --mount=type=bind,src=/home/admin/actions-runner/_work/_temp/depends/sources,dst=/home/admin/actions-runner/_work/_temp/depends/sources --mount=type=bind,src=/home/admin/actions-runner/_work/_temp/previous_releases,dst=/home/admin/actions-runner/_work/_temp/previous_releases --mount=type=bind,src=/home/admin/actions-runner/_work/_temp/build,dst=/home/admin/actions-runner/_work/_temp/build --env-file=/tmp/env-admin-ci_win64 --name=ci_win64 --network=ci-ip6net --platform=linux ci_win64