Update moderation.md (#703)

Title for Integration Patterns was incorrect since Patterns was spelled
as Patters

## What this does

Simple spelling mistake fix.

## Type of change

- [ ] Bug fix
- [ ] New feature
- [ ] Breaking change
- [x] Documentation
- [ ] Performance improvement

## Scope check

- [x] I read the [Contributing
Guide](https://github.com/crmne/ruby_llm/blob/main/CONTRIBUTING.md)
- [x] This aligns with RubyLLM's focus on **LLM communication**
- [x] This isn't application-specific logic that belongs in user code
- [x] This benefits most users, not just my specific use case

Author: artinboghosian

docs/_core_features/moderation.md

@@ -139,7 +139,7 @@ end
 
 Refer to the [Available Models Reference]({% link _reference/available-models.md %}) for details on moderation models and their capabilities.
 
-## Integration Patters
+## Integration Patterns
 
 ### Pre-Chat Moderation