Update README_FINE_GRAIN_PERMISSION.md

Author: lgrateau

authentication/Keycloak/README_FINE_GRAIN_PERMISSION.md

@@ -77,8 +77,8 @@ Note: To avoid an error on the image push, perhaps you will have to add $REGISTR
       insecure = true
 
 ## Deploy Keycloak Service using the keycloak-scim image
-
-- Get the [keycloak.yaml](https://raw.githubusercontent.com/keycloak/keycloak-quickstarts/latest/openshift/keycloak.yaml) file
+https://raw.githubusercontent.com/keycloak/keycloak-quickstarts/refs/heads/main/openshift/keycloak.yaml
+- Get the [keycloak.yaml](https://raw.githubusercontent.com/keycloak/keycloak-quickstarts/refs/heads/main/openshift/keycloak.yaml) file
 - Replace the provided image: input using image-registry.openshift-image-registry.svc:5000/\<my-keycloak-project>/keycloak-scim:latest
 
 ```shell