Bump openid-client from 5.7.0 to 6.3.4 in /server

Bumps [openid-client](https://github.com/panva/openid-client) from 5.7.0 to 6.3.4.
- [Release notes](https://github.com/panva/openid-client/releases)
- [Changelog](https://github.com/panva/openid-client/blob/main/CHANGELOG.md)
- [Commits](panva/openid-client@v5.7.0...v6.3.4)

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

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

Author: dependabot[bot]

server/package-lock.json

@@ -26,7 +26,7 @@
         "helmet": "^8.0.0",
         "https-proxy-agent": "^7.0.0",
         "jsonwebtoken": "^9.0.0",
-        "openid-client": "^5.0.2",
+        "openid-client": "^6.3.4",
         "passport": "^0.7.0",
         "passport-jwt": "^4.0.0",
         "pino": "^9.6.0",