Update authentication.rst

I tried it today on QGIS 3.28.12. It's mentioned in this post https://gis.stackexchange.com/questions/438856/create-esri-token-authentication-in-pyqgis. "Esri-Token" is not recognized by the authentication manager in QGIS and the token is not stored.

docs/pyqgis_developer_cookbook/authentication.rst

@@ -210,7 +210,7 @@ Available Authentication methods
 authentication manager init. Available authentication methods are:
 
 #. ``Basic`` User and password authentication
-#. ``Esri-Token`` ESRI token based authentication
+#. ``EsriToken`` ESRI token based authentication
 #. ``Identity-Cert`` Identity certificate authentication
 #. ``OAuth2`` OAuth2 authentication
 #. ``PKI-Paths`` PKI paths authentication