chore(deps): update containerbase/internal-tools action to v1.21.20 · visualon/docker-watchtower@cc01642

Failed to download action 'https://api.github.com/repos/containerbase/internal-tools/tarball/c3bf18e3d5e449a392e8a6a8d9b301398316a6e5'. Error: Response status code does not indicate success: 502 (Bad Gateway).