Update exchange-integration-guide.md (MystenLabs#9598)

## Description 

Describe the changes or additions included in this PR.

## Test Plan 

How did you test the new or updated feature?

---
If your changes are not user-facing and not a breaking change, you can
skip the following section. Otherwise, please indicate what changed, and
then add to the Release Notes section as highlighted during the release
process.

### Type of Change (Check all that apply)

- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

doc/src/learn/exchange-integration-guide.md

@@ -11,7 +11,7 @@ The requirements to configure a SUI integration include:
  * Suggested hardware requirements to run a Sui Full node:
     * CPU: 10 core
     * RAM: 32 GB
-    * Storage: 1 TB SSD
+    * Storage: 2 TB SSD
 
 We recommend running Sui Full nodes on Linux. Sui supports the Ubuntu and Debian distributions.