update payload exchange token and scope in cern-vre-jhub scopes

infrastructure/cluster/flux/jhub/jhub-release.yaml

@@ -88,6 +88,7 @@ spec:
                       'client_id': self.client_id,
                       'client_secret': self.client_secret,
                       'grant_type': 'urn:ietf:params:oauth:grant-type:token-exchange',
+                      'subject_token_type': 'urn:ietf:params:oauth:token-type:access_token',
                       'subject_token': token,
                       'scope': 'openid profile offline_access',
                       'audience': 'rucio'