Bump jsrsasign from 10.4.1 to 10.5.27 in /packages/backend

Bumps [jsrsasign](https://github.com/kjur/jsrsasign) from 10.4.1 to 10.5.27.
- [Release notes](https://github.com/kjur/jsrsasign/releases)
- [Changelog](https://github.com/kjur/jsrsasign/blob/master/ChangeLog.txt)
- [Commits](kjur/jsrsasign@10.4.1...10.5.27)

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

Signed-off-by: dependabot[bot] <[email protected]>