CSS needs a slash to oidcIssuer. NSS has no slash

no authentication after migration
```
2024-11-20T18:13:55.254Z [DPoPWebIdExtractor] {Primary} warn: Error verifying WebID via DPoP-bound access token: The access token issuer doesn't match its associated WebID's trusted OIDC issuers.
18|pivot  | Actual: https://solidcommunity.net:8443
18|pivot  | Expected: https://solidcommunity.net:8443/
```