chore(deps): update dependency flux-manifests to v2.8.5

Author: renovate[bot]

clusters/home/flux/system/flux.yaml

@@ -7,7 +7,7 @@ spec:
   interval: 1h
   url: https://github.com/fluxcd/flux2.git
   ref:
-    tag: v2.6.1
+    tag: v2.8.5
   ignore: |
     /*
     !/manifests