Logically re-apply 64c70a8c4c ("doc: point out that nixos-21.05 has gnuradio
3.9"), because it was lost in the conversion from docbook to markdown, in
commit 32c2dd304d ("docs: nixos release notes to CommonMark (2105)").
(Apparently we have both .md and .xml release notes now, and CI fails
unless they have the same content (after .md processing), so update the
.xml file to match...)
(cherry picked from commit cfe8c3a75eaa427f48bc93b15c65b826c00d7401)
Logically re-apply 7afaacf9a8 ("doc: fix link to kodi-19.0 announcement"),
because it was lost in the conversion from docbook to markdown, in commit
32c2dd304d ("docs: nixos release notes to CommonMark (2105)").
(Hm, apparently we have *both* docbook and markdown? CI failed before I
updated the .xml file.)
(cherry picked from commit c2a3ff28be9712b598d84cdc94a7894ca59c772c)