[bitnami/Keycloak] Fix tls ingress documentation (#10722)

Signed-off-by: Antoine Pultier <antoine.pultier@sintef.no>

bitnami/keycloak/Chart.yaml

@@ -26,4 +26,4 @@ name: keycloak
 sources:
   - https://github.com/bitnami/bitnami-docker-keycloak
   - https://github.com/keycloak/keycloak
-version: 9.2.7
+version: 9.2.8

bitnami/keycloak/README.md

@@ -402,14 +402,7 @@ The chart also facilitates the creation of TLS secrets for use with the Ingress
 
 ### Use with ingress offloading SSL
 
-If your ingress controller has the SSL Termination, you should set `proxyAddressForwarding` to `true` or you should add the following env vars in `extraEnvVars`
-
-```yaml
-- name: KEYCLOAK_PROXY_ADDRESS_FORWARDING
-  value: "true"
-- name: KEYCLOAK_FRONTEND_URL
-  value: "https://keycloak.xxx"
-```
+If your ingress controller has the SSL Termination, you should set `proxy` to `edge`.
 
 ### Manage secrets and passwords
 
@@ -443,4 +436,4 @@ Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
-limitations under the License.
+limitations under the License.