docs: update changelog for v1.1.29

Update stale-issues.yml

docs: add public feature flag config

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

docs: update changelog for v1.1.26

docs: update changelog for v1.1.25

docs: update changelog for v1.1.24

docs: update changelog for v1.1.23

docs: update changelog for v1.1.21

docs: update changelog for v1.1.21

docs: update changelog for v1.1.20