Update hardware specs for execution node in node-provisioning.md (#849)

docs/networks/node-ops/node-operation/node-provisioning.md

@@ -13,7 +13,7 @@ The hardware your Node will need varies depending on the role your Node will pla
 |:----------------:| ---------:| ------:| ------:|:--------------:|:--------------:|
 | **Collection**   |  4 cores  | 32 GB  | 200 GB | n2-highmem-4   | r6i.xlarge     |
 | **Consensus**    |  2 cores  | 16 GB  | 200 GB | n2-standard-4  | m6a.xlarge     |
-| **Execution**    | 64 cores  | 800 GB |  9 TB  | n2-highmem-128 | r6i.32xlarge   |
+| **Execution**    | 128 cores  | 864 GB |  9 TB (with maintenance see: [pruning chunk data pack](https://forum.flow.com/t/execution-node-upgrade-to-v0-31-15-and-managing-disk-space-usage/5167) or 30 TB without maintenance)  | n2-highmem-128 |    |
 | **Verification** |  2 cores  | 16 GB  | 200 GB | n2-highmem-2   | r6a.large      |
 | **Access**       |  16 cores | 64 GB  | 750 GB | n2-standard-16 | m6i.4xlarge  |
 | **Observer**     |  2 cores  | 4 GB   | 300 GB | n2-standard-4  | m6i.xlarge     |