STCOR-866 include /users-keycloak/_self in auth-n requests

The RTR cycle is kicked off when processing the reponse from an
authentication-related request. `/users-keycloak/_self` was missing
from the list, which meant that RTR would never kick off when a new tab
was opened for an existing session.

Refs STCOR-866

CHANGELOG.md

@@ -19,6 +19,7 @@
 * Always retrieve `clientId` and `tenant` values from `config.tenantOptions` in stripes.config.js. Retires `okapi.tenant`, `okapi.clientId`, and `config.isSingleTenant`. Refs STCOR-787.
 * List UI apps in "Applications/modules/interfaces" column. STCOR-773
 * Correctly evaluate `stripes.okapi` before rendering `<RootWithIntl>`. Refs STCOR-864.
+* `/users-keycloak/_self` is an authentication request. Refs STCOR-866.
 
 ## [10.1.1](https://github.com/folio-org/stripes-core/tree/v10.1.1) (2024-03-25)
 [Full Changelog](https://github.com/folio-org/stripes-core/compare/v10.1.0...v10.1.1)