fix(container): update flux group

| datasource | package                             | from   | to     |
| ---------- | ----------------------------------- | ------ | ------ |
| docker     | ghcr.io/fluxcd/kustomize-controller | v1.8.4 | v1.8.5 |
| docker     | ghcr.io/fluxcd/source-controller    | v1.8.3 | v1.8.4 |


Signed-off-by: Winston R. Milling <wrmilling@users.noreply.github.com>

Author: renovate[bot]

flux-system/gotk-components.yaml

@@ -2560,7 +2560,7 @@ spec:
             resourceFieldRef:
               containerName: manager
               resource: limits.memory
-        image: ghcr.io/fluxcd/source-controller:v1.8.3
+        image: ghcr.io/fluxcd/source-controller:v1.8.4
         imagePullPolicy: IfNotPresent
         livenessProbe:
           httpGet:
@@ -3387,7 +3387,7 @@ spec:
             resourceFieldRef:
               containerName: manager
               resource: limits.memory
-        image: ghcr.io/fluxcd/kustomize-controller:v1.8.4
+        image: ghcr.io/fluxcd/kustomize-controller:v1.8.5
         imagePullPolicy: IfNotPresent
         livenessProbe:
           httpGet: