The issue generation had been [failing][1] since updating to the `v3`
major version of the [issue bot generator][2].  This commit fixes things
by also using the [separate template action][3] as required from `v3`
onwards.

[1]: https://github.com/agilepathway/label-checker/runs/8282280912?check_suite_focus=true
[2]: https://github.com/imjohnbo/issue-bot/releases/tag/v3.0.0
[3]: https://github.com/imjohnbo/extract-issue-template-fields

GitHub Actions make the latest [Ubuntu LTS version][1] available every 2
years. They made the [22.04 version available in August 2022], so this
commit updates our GitHub Action workflows to use it.

[1]: https://wiki.ubuntu.com/Releases
[2]: https://github.blog/changelog/2022-08-09-github-actions-ubuntu-22-04-is-now-generally-available-on-github-hosted-runners/

The PR body doesn't form part of the commit, so there is no need to
check it.

NB If the commit message checker changes in the future to [check the PR
commit messages rather than the PR body][1] then we can reinstate the
checks then.

[1]: mristin/opinionated-commit-message#28

Dependabot doesn't have write access, so it can't do the Docker build
and deploy.  This commit ensures that it doesn't try to anymore.

Bumps [reviewdog/action-hadolint](https://github.com/reviewdog/action-hadolint) from 1.22 to 1.33.
- [Release notes](https://github.com/reviewdog/action-hadolint/releases)
- [Commits](reviewdog/action-hadolint@v1.22...v1.33)

---
updated-dependencies:
- dependency-name: reviewdog/action-hadolint
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [github.com/magefile/mage](https://github.com/magefile/mage) from 1.11.0 to 1.13.0.
- [Release notes](https://github.com/magefile/mage/releases)
- [Changelog](https://github.com/magefile/mage/blob/master/.goreleaser.yml)
- [Commits](magefile/mage@v1.11.0...v1.13.0)

---
updated-dependencies:
- dependency-name: github.com/magefile/mage
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>