fix changelog

Signed-off-by: jkoberg <[email protected]>

changelog/3.0.0_2023-06-06/role-assignment-from-oidc.md

@@ -4,7 +4,7 @@ oCIS can now be configured to update a user's role assignment from the values of
 via the IDPs userinfo endpoint. The claim name and the mapping between claim values and ocis role
 name can be configured via the configuration of the proxy service. Example:
 
-```yaml
+```
 role_assignment:
     driver: oidc
     oidc_role_mapper: