docs: split out <3.x.x CHANGELOG.md
for faster loading
#13352
Merged
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Fixes "Future Work" section of #13236
Motivation
CHANGELOG.md
is quite large and so can take some time to load as it's a giant file (>10k LoC)Modifications
CHANGELOG-2-x-x.md
fileVerification
Ran
./hack/changelog.sh > CHANGELOG.md
and got no diff