Bump openid-client from 5.7.0 to 6.6.4

Bumps [openid-client](https://github.com/panva/openid-client) from 5.7.0 to 6.6.4.
- [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...v6.6.4)

---
updated-dependencies:
- dependency-name: openid-client
  dependency-version: 6.6.4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "@sigstore/oci": "^0.6.0",
     "@sigstore/sign": "^4.0.0",
     "open": "^8.4.2",
-    "openid-client": "^5.7.0",
+    "openid-client": "^6.8.0",
     "sigstore": "^4.0.0"
   },
   "devDependencies": {