[stable/prometheus-operator] Update README.md for wrong example prometheus.prometheusSpec.retentionSize

stable/prometheus-operator/README.md

@@ -259,7 +259,7 @@ The following tables list the configurable parameters of the prometheus-operator
 | `prometheus.prometheusSpec.replicaExternalLabelName` | Name of the external label used to denote replica name. | `""` |
 | `prometheus.prometheusSpec.replicas` | Number of instances to deploy for a Prometheus deployment. | `1` |
 | `prometheus.prometheusSpec.resources` | Define resources requests and limits for single Pods. | `{}` |
-| `prometheus.prometheusSpec.retentionSize` | Used Storage Prometheus shall retain data for. Example 50g (50 Gigabyte). Can be combined with prometheus.prometheusSpec.retention | `""` |
+| `prometheus.prometheusSpec.retentionSize` | Used Storage Prometheus shall retain data for. Example 50GiB (50 Gigabyte). Can be combined with prometheus.prometheusSpec.retention | `""` |
 | `prometheus.prometheusSpec.walCompression` | Enable compression of the write-ahead log using Snappy. This flag is only available in versions of Prometheus >= 2.11.0. | `false` |
 | `prometheus.prometheusSpec.retention` | Time duration Prometheus shall retain data for. Must match the regular expression `[0-9]+(ms\|s\|m\|h\|d\|w\|y)` (milliseconds seconds minutes hours days weeks years). | `10d` |
 | `prometheus.prometheusSpec.routePrefix` | The route prefix Prometheus registers HTTP handlers for. This is useful, if using ExternalURL and a proxy is rewriting HTTP routes of a request, and the actual ExternalURL is still true, but the server serves requests under a different route prefix. For example for use with `kubectl proxy`. | `/` |