Fix one more lifetime bug in `ensure_started` for cases when the sender is dropped without connecting it #368

	# Copyright (c) 2023 ETH Zurich
	#
	# SPDX-License-Identifier: BSL-1.0
	# Distributed under the Boost Software License, Version 1.0. (See accompanying
	# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

	name: Documentation

	on:
	merge_group:
	pull_request:
	branches:
	# Development and release branches
	- main
	- release**
	push:
	branches:
	# Development and release branches
	- main
	- release**
	# Bors branches
	- trying
	- staging

	jobs:
	build:
	name: github/documentation/build
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Install sphinx and a theme
	run: \|
	sudo apt update
	sudo apt install \
	--allow-downgrades \
	--allow-remove-essential \
	--allow-change-held-packages \
	python3 python3-pip
	pip install sphinx sphinx-material
	- name: Build documentation
	run: sphinx-build -W -n -a -b html docs build/docs
	- name: Upload HTML output as artifact
	uses: actions/upload-pages-artifact@v2
	with:
	path: build/docs

	deploy:
	needs: build
	name: github/documentation/deploy
	runs-on: ubuntu-latest
	if: github.ref == 'refs/heads/main' && github.repository == 'pika-org/pika'

	permissions:
	contents: read
	pages: write
	id-token: write
	concurrency:
	group: "pages"
	cancel-in-progress: false
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}

	steps:
	- name: Deploy documentation to GitHub Pages
	uses: actions/deploy-pages@v2
	id: deployment

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