upgrade kube-prometheus-stack to 32.1.0

The chart version 32.2.0 appears to change the way that dashboard configs
are labeled by the chart, I do not know what is the purpose of this change
yet, however it causes our Flux dashboards to fail to be included.

Signed-off-by: Kingdon Barrett <kingdon@weave.works>

manifests/monitoring/kube-prometheus-stack/release.yaml

@@ -6,7 +6,7 @@ spec:
   interval: 5m
   chart:
     spec:
-      version: 23.2.0
+      version: 32.1.0
       chart: kube-prometheus-stack
       sourceRef:
         kind: HelmRepository