LNbits 1.5.6

What's Changed

• refactor: set extension field for payments by @motorina0 in https://github.com/lnbits/lnbits/pull/4031
• NWC funding source: Reduce polling by @blackcoffeexbt in https://github.com/lnbits/lnbits/pull/4008
• CI: appimage upload-urls with gh upload command by @dni in https://github.com/lnbits/lnbits/pull/4036
• feat: use lnbits price aggregator to save loads of request by @dni in https://github.com/lnbits/lnbits/pull/4026
• feat: keep funding source on default reset, force seed backup by @arcbtc in https://github.com/lnbits/lnbits/pull/4040
• chore: update to v1.5.6 by @dni in https://github.com/lnbits/lnbits/pull/4044

Full Changelog: https://github.com/lnbits/lnbits/compare/v1.5.5...v1.5.6