update xx to v1.6.1 for compatibility with alpine 3.21 and file 5.46+
This fixes compatibility with alpine 3.21 and file 5.46+
- Fix additional possible `xx-cc`/`xx-cargo` compatibility issue with Alpine 3.21
- Support for Alpine 3.21
- Fix `xx-verify` with `file` 5.46+
- Fix possible error taking lock in `xx-apk` in latest Alpine without `coreutils`
full diff: https://github.com/tonistiigi/xx/compare/v1.2.1...v1.6.1
Signed-off-by: Sebastiaan van Stijn <[email protected]>
Sebastiaan van Stijn