fix regex escape in _get_pandoc_urls (#362) #254

Job	Run time
test (ubuntu-20.04, 3.7)	34s
test (ubuntu-20.04, 3.8)	37s
test (ubuntu-20.04, 3.9)	47s
test (ubuntu-20.04, 3.10)	34s
test (ubuntu-20.04, 3.11)	34s
test (ubuntu-20.04, 3.12)	36s
test (ubuntu-20.04, pypy3.8)	1m 15s
test (ubuntu-20.04, pypy3.9)	51s
test (ubuntu-20.04, pypy3.10)	5m 24s
test (ubuntu-22.04, 3.7)	35s
test (ubuntu-22.04, 3.8)	34s
test (ubuntu-22.04, 3.9)	42s
test (ubuntu-22.04, 3.10)	40s
test (ubuntu-22.04, 3.11)	33s
test (ubuntu-22.04, 3.12)	40s
test (ubuntu-22.04, pypy3.8)	1m 57s
test (ubuntu-22.04, pypy3.9)	59s
test (ubuntu-22.04, pypy3.10)	3m 49s
test (macos-13, 3.7)	1m 50s
test (macos-13, 3.8)	1m 35s
test (macos-13, 3.9)	1m 52s
test (macos-13, 3.10)	1m 34s
test (macos-13, 3.11)	1m 34s
test (macos-13, 3.12)	1m 35s
test (macos-13, pypy3.8)	1m 58s
test (macos-13, pypy3.9)	1m 48s
test (macos-13, pypy3.10)	8m 18s
test (windows-2022, 3.7)	2m 51s
test (windows-2022, 3.8)	2m 35s
test (windows-2022, 3.9)	2m 50s
test (windows-2022, 3.10)	1m 46s
test (windows-2022, 3.11)	1m 52s
test (windows-2022, 3.12)	2m 28s
test (windows-2022, pypy3.8)	3m 6s
test (windows-2022, pypy3.9)	3m 15s
test (windows-2022, pypy3.10)	5m 31s
builder_pypandoc	10s
builder_pypandoc_binary (macos-14)	1m 2s
builder_pypandoc_binary (windows-2022)	1m 50s
builder_pypandoc_binary (ubuntu-22.04)	4m 58s
publisher_latest	24s
publisher_release	0s
	1h 18m 23s

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