fix: set antivirus plugin as 'tested' - #53

No file matched to [/home/runner/work/plugin-registry/plugin-registry/**/*requirements*.txt,/home/runner/work/plugin-registry/plugin-registry/**/*requirements*.in,/home/runner/work/plugin-registry/plugin-registry/**/*constraints*.txt,/home/runner/work/plugin-registry/plugin-registry/**/*constraints*.in,/home/runner/work/plugin-registry/plugin-registry/**/pyproject.toml,/home/runner/work/plugin-registry/plugin-registry/**/uv.lock,/home/runner/work/plugin-registry/plugin-registry/**/*.py.lock]. The cache will never get invalidated. Make sure you have checked out the target repository and configured the cache-dependency-glob input correctly.