add support for ubuntu 22.04, drop ubuntu-18.04 - [starting with 8 of August 2022 support for ubuntu 18.04 is deprecated](https://github.blog/changelog/2022-08-09-github-actions-the-ubuntu-18-04-actions-runner-image-is-being-deprecated-and-will-be-removed-by-12-1-22/) - [ubuntu 22.04 is generally available](https://github.blog/changelog/2022-08-09-github-actions-ubuntu-22-04-is-now-generally-available-on-github-hosted-runners/) |
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| .. | ||
| codeql-analysis.yml | ||
| dependency-review.yml | ||
| dev-image.yml | ||
| label-commenter.yml | ||
| purge-readme-image-cache.yml | ||
| release.yml | ||
| test-action.yml | ||
| test.yml | ||
| update-major-tag.yml | ||