docs: Move `funding-manifest-urls` to website #2076

Job	Run time
pages	7s
test (stable, ubuntu-latest)	2m 36s
test (stable, macos-latest)	2m 40s
test (stable, windows-latest)	5m 17s
test (oldstable, ubuntu-latest)	2m 40s
test (oldstable, macos-latest)	3m 20s
test (oldstable, windows-latest)	6m 18s
	22m 58s

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