Bump lfit/releng-reusable-workflows from 0.2.19 to 0.2.21

Bump lfit/releng-reusable-workflows from 0.2.19 to 0.2.21

Bumps [lfit/releng-reusable-workflows](https://github.com/lfit/releng-reusable-workflows) from 0.2.19 to 0.2.21.
- [Release notes](https://github.com/lfit/releng-reusable-workflows/releases)
- [Commits](https://github.com/lfit/releng-reusable-workflows/compare/f318aaac9f4fce73a8059fe95ba9080833e018c2...4231fda07b06d356c904fe39a868522393dee4bb)

updated-dependencies:
- dependency-name: lfit/releng-reusable-workflows
  dependency-version: 0.2.21
  dependency-type: direct:production
  update-type: version-update:semver-patch

CIMAN-33

Change-Id: Ib1cba0852c145006031464a1cbea0536309d115e
Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: onap.gh2gerrit <releng+onap-gh2gerrit@linuxfoundation.org>