escape extracted CHANGELOG in release pipeline

Merge pull request #565 from tweag/prepare-release-0.12

Prepare release 0.12.0

Merge pull request #493 from tweag/release-0.11.1

release 0.11.1

Merge pull request #488 from tweag/release-0.11.0

Release 0.11.0

Merge pull request #433 from tweag/bcr-test

Release 0.10.0

Release 0.9.0

Merge pull request #151 from tweag/release-0.8.0

Release 0.8.0

refactoring: simplify nix-file-deps code a tad

Merge pull request #98 from tweag/release-0.6.0

Release 0.6.0

Releasing rules_nixpkgs 0.5.2