Update prometheus-operator-mixin to monitoring-mixins-v1.6.0 (#610)

Signed-off-by: Nicolas Lamirault <nlamirault@users.noreply.github.com>
Co-authored-by: Nicolas Lamirault <nlamirault@users.noreply.github.com>

charts/prometheus-operator-mixin/Chart.yaml

@@ -27,8 +27,8 @@ keywords:
   - prometheus-operator
   - monitoring-mixin
   - portefaix
-version: 1.2.0
-appVersion: 0.64.0
+version: 1.3.0
+appVersion: 0.69.1
 
 maintainers:
   - name: nlamirault
@@ -52,4 +52,4 @@ annotations:
     url: https://keybase.io/nlamirault/pgp_keys.asc
   artifacthub.io/changes: |
     - kind: changed
-      description: prometheus-operator-mixin v0.64.0
+      description: prometheus-operator-mixin v0.69.1