chore(deps): update image netboxcommunity/netbox to v4

Signed-off-by: Mark Glants <mglants@users.noreply.github.com>

Author: renovate[bot]

kubernetes/subterra/apps/apps/netbox/app/helmrelease.yaml

@@ -21,7 +21,7 @@ spec:
     image:
       repository: netboxcommunity/netbox
       pullPolicy: IfNotPresent
-      tag: v3.7.8
+      tag: v4.0.8
     timeZone: Europe/Moscow
     existingSecret: &secret netbox-secret
     superuser: