Update Docker image ghcr.io/goauthentik/server to v2024.4.0-rc1

| datasource | package                    | from     | to           |
| ---------- | -------------------------- | -------- | ------------ |
| docker     | ghcr.io/goauthentik/server | 2024.2.3 | 2024.4.0-rc1 |


Signed-off-by: Nicholas St. Germain <dirtycajunrice@users.noreply.github.com>

cluster-apps/authentik/values.yaml

@@ -26,7 +26,7 @@ authentik:
 
   image:
     repository: ghcr.io/goauthentik/server
-    tag: 2024.2.3
+    tag: 2024.4.0-rc1
     # name: docker.beryju.org/authentik/server
     # tag: gh-next
     # name: jenslanghammer/authentik-test