Bump test chart dependencies (#264)

Bump the Helm charts used in test scenarios to latest available
versions.

---------

Signed-off-by: GitHub <[email protected]>
Signed-off-by: Kevin Fox <[email protected]>
Co-authored-by: marcofranssen <[email protected]>
Co-authored-by: Kevin Fox <[email protected]>

.github/tests/charts.json

@@ -2,7 +2,7 @@
   {
     "name": "kube-prometheus-stack",
     "repo": "https://prometheus-community.github.io/helm-charts",
-    "version": "45.23.0"
+    "version": "45.26.0"
   },
   {
     "name": "cert-manager",
@@ -12,6 +12,6 @@
   {
     "name": "ingress-nginx",
     "repo": "https://kubernetes.github.io/ingress-nginx",
-    "version": "4.6.0"
+    "version": "4.6.1"
   }
 ]