Update changelog

Bump version of create-pull-request action

New version will avoid deprecation warnings for add-path
and set-var.

Update changelog in preparation for v1.2.2 release (github#433)

* Update changelog in preparation for v1.2.2 release

Co-authored-by: Shati Patel <42641846+shati-patel@users.noreply.github.com>

Update extensions/ql-vscode/CHANGELOG.md

Update changelog date.

Merge pull request github#207 from alexet/add-v1.0.3-date-to-changelog

Add v1.0.3 date to changelog.

Merge pull request github#195 from jcreedcmu/changelog

Update changelog