feat(charts): update helm release matrix-synapse to v3.8.0

Author: renovate[bot]

k8s/k8s-prod/workloads/comms/matrix-synapse/app/helmrelease.yaml

@@ -10,7 +10,7 @@ spec:
     spec:
       # renovate: registryUrl=https://ananace.gitlab.io/charts
       chart: matrix-synapse
-      version: 3.7.14
+      version: 3.8.0
       sourceRef:
         kind: HelmRepository
         name: ananace