readthedocs: update markdown #1849

Job	Run time
coverage-test	6m 28s
coverity-test	0s
master-tss-build-test (gcc)	18m 0s
build-test (ubuntu-20.04, gcc)	6m 6s
master-tss-build-test (clang)	4m 58s
build-test (ubuntu-20.04, clang)	4m 52s
build-test (fedora-30, gcc)	5m 57s
build-test (fedora-30, clang)	5m 21s
build-test (opensuse-leap, gcc)	6m 5s
build-test (opensuse-leap, clang)	5m 13s
build-test (fedora-32, gcc)	5m 54s
build-test (fedora-32, clang)	5m 12s
build-test (ubuntu-22.04, gcc)	11m 16s
build-test (ubuntu-22.04, clang)	10m 40s
	1h 36m 2s

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