docs(tvix): add reconstructed changelog for the Nix language r/5662

This was put together by digging through the C++ Nix git history as
described in the second paragraph. Note that this is only based on
changes given when the language version was actually increased.

There is no guarantee that there have been no other changes inbetween
that would have warranted an increase as well.

Change-Id: I4ddee0d4ecafa1b3e5e1a867e9700d6c32e936ad
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7836
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>

0 files changed, 0 insertions, 0 deletions