⬆️ Bump jwcrypto from 1.5.1 to 1.5.6 in /backend (#1147)

Bumps [jwcrypto](https://github.com/latchset/jwcrypto) from 1.5.1 to 1.5.6.
- [Release notes](https://github.com/latchset/jwcrypto/releases)
- [Commits](latchset/jwcrypto@v1.5.1...v1.5.6)

---
updated-dependencies:
- dependency-name: jwcrypto
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Faris Durrani <[email protected]>