Use keepnetwork/keep-client:v2.1.0 for keep-maintainer on production (#3817)

Here we point the production instance of `keep-maintainer` to the latest
public Docker image, i.e. `keepnetwork/keep-client:v2.1.0` which
introduces support of SPV proofs for moving funds and moved funds sweep
transactions.

Author: tomaszslabon

infrastructure/kube/keep-prd/keep-maintainer/kustomization.yaml

@@ -11,7 +11,7 @@ commonLabels:
 images:
   - name: keep-maintainer
     newName: keepnetwork/keep-client
-    newTag: v2.0.0
+    newTag: v2.1.0
 
 configMapGenerator:
   - name: keep-maintainer-config