fix: increase cpu zeebe limit to 1.7 while keeping cpu-request at 1.35

With the previous limit throttling was very high (even > 80%).
With this limit, there is less backpressure & less timeouts which reduce
the cpu usage to around 1 (from 1.2).

charts/zeebe-benchmark/values-realistic-benchmark.yaml

@@ -237,7 +237,7 @@ camunda-platform:
     # Resources configuration to set request and limit configuration for the container https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/#requests-and-limitsS
     resources:
       limits:
-        cpu: 1350m
+        cpu: 1700m
         memory: 4Gi
       requests:
         cpu: 1350m