[kube-prometheus-stack] Update reference URL and fix typo (#5467)

Signed-off-by: blueswen <[email protected]>

Author: blueswen

Diff for: charts/kube-prometheus-stack/Chart.yaml

@@ -31,7 +31,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 70.2.0
+version: 70.2.1
 appVersion: v0.81.0
 kubeVersion: ">=1.19.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus