fix(monitoring): Drop hardcoded values for cert-gen job

infrastructure/monitoring/release.yaml

@@ -150,12 +150,13 @@ data:
         enabled: true
         patch:
           enabled: true
-          image:
-            repository: k8s.gcr.io/ingress-nginx/kube-webhook-certgen
-            tag: v1.0
-            sha: "f3b6b39a6062328c095337b4cadcefd1612348fdd5190b1dcbcb9b9e90bd8068"
-            pullPolicy: IfNotPresent
-          resources: {}
+          resources:
+            limits:
+              cpu: 500m
+              memory: 512Mi
+            requests:
+              cpu: 100m
+              memory: 256Mi
           priorityClassName: "system-cluster-critical"
           securityContext:
             runAsGroup: 2000