Bump test chart dependencies (#355)

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: marcofranssen <[email protected]>

.github/tests/charts.json

@@ -2,7 +2,7 @@
   {
     "name": "kube-prometheus-stack",
     "repo": "https://prometheus-community.github.io/helm-charts",
-    "version": "58.4.0"
+    "version": "58.5.0"
   },
   {
     "name": "cert-manager",
@@ -22,6 +22,6 @@
   {
     "name": "postgresql",
     "repo": "https://charts.bitnami.com/bitnami",
-    "version": "15.2.8"
+    "version": "15.2.12"
   }
 ]