Enforce towncrier requirements for docs to fix CI #666

Job	Run time
⚙️ Pre-set global build settings	1s
lint / Linter	2m 17s
📦 Build distribution packages	9s
build-wheels-for-tested-arches (macos) / Build wheels on macos	2m 14s
build-wheels-for-tested-arches (windows) / Build wheels on windows	4m 15s
build-wheels-for-tested-arches (ubuntu) / Build wheels on ubuntu	1m 47s
Test (3.12, ubuntu, false)	35s
Test (3.12, macos, false)	29s
Test (3.12, windows, false)	1m 13s
Test (3.12, Y, ubuntu, false)	25s
Test (3.11, ubuntu, false)	24s
Test (3.11, macos, false)	24s
Test (3.11, windows, false)	1m 2s
Test (3.11, Y, ubuntu, false)	26s
Test (3.10, ubuntu, false)	31s
Test (3.10, macos, false)	26s
Test (3.10, windows, false)	1m 14s
Test (3.10, Y, ubuntu, false)	24s
Test (3.9, ubuntu, false)	26s
Test (3.9, macos, false)	31s
Test (3.9, windows, false)	1m 10s
Test (3.9, Y, ubuntu, false)	25s
Test (3.8, ubuntu, false)	37s
Test (3.8, macos, false)	56s
Test (3.8, windows, false)	1m 19s
Test (3.8, Y, ubuntu, false)	33s
Test (pypy-3.10, Y, false, ubuntu)	53s
Test (pypy-3.9, Y, false, ubuntu)	43s
Test (pypy-3.8, Y, false, ubuntu)	1m 0s
Test matrix status	8s
Pre-Deploy	0s
build-wheels-for-odd-archs	0s
Deploy	0s
	26m 57s

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