Documentation Error in USDM IG Extension Example 4 (Page 102)

## Summary

There is an error in Example 4 on page 102 of the USDM Implementation Guide. The example demonstrates extending a code class with two array attributes of differing types, but the JSON example is missing required `valueInteger` properties for the integer array attribute.

## Location

- **Page**: 102
- **Example**: Example 4 - Extending a code class with array attributes

## Issue Description

The provided USDM JSON example shows extension attributes for an `intArrayAttribute`, but the extension attribute objects are missing the `valueInteger` property that should contain the actual integer values.

### Current (Incorrect) JSON

The example currently shows:

```json
{
"id": "ExtensionAttributeValue_21",
"url": "http://cdisc.org/usdm/extensions/extension-2/intArrayAttribute",
"extensionAttributes": [],
"instanceType": "ExtensionAttribute"
},
{
"id": "ExtensionAttributeValue_22",
"url": "http://cdisc.org/usdm/extensions/extension-2/intArrayAttribute",
"extensionAttributes": [],
"instanceType": "ExtensionAttribute"
}
```

### Expected (Correct) JSON

The extension attributes should include the `valueInteger` property:

```json
{
"id": "ExtensionAttributeValue_21",
"url": "http://cdisc.org/usdm/extensions/extension-2/intArrayAttribute",
"valueInteger": 11,
"extensionAttributes": [],
"instanceType": "ExtensionAttribute"
},
{
"id": "ExtensionAttributeValue_22",
"url": "http://cdisc.org/usdm/extensions/extension-2/intArrayAttribute",
"valueInteger": 12,
"extensionAttributes": [],
"instanceType": "ExtensionAttribute"
}
```

## Impact

This error makes the example inconsistent with the stated logical equivalence and could mislead implementers about how to properly structure integer array extensions in USDM JSON.