Bump openid-client from 5.5.0 to 5.6.1 in /server

Bumps [openid-client](https://github.com/panva/node-openid-client) from 5.5.0 to 5.6.1.
- [Release notes](https://github.com/panva/node-openid-client/releases)
- [Changelog](https://github.com/panva/node-openid-client/blob/main/CHANGELOG.md)
- [Commits](panva/openid-client@v5.5.0...v5.6.1)

---
updated-dependencies:
- dependency-name: openid-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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