Fix #250: Clarify case sensitivity of APIPublisher and APIGroup

[JeremyVyska]

Description

Fixes #250

The documentation stated that APIPublisher and APIGroup values are case insensitive, but as reported by @ArthurHardCoding, these values are actually case sensitive when checking for active subscriptions.

Changes

Updated the documentation for both properties to clarify:

• Values are case insensitive for HTTP operations (GET, POST, etc.)
• Values are case sensitive when checking for active subscriptions

This clarification will help developers avoid issues when implementing webhook subscriptions or similar functionality.

Testing

• Documentation accurately reflects the real behavior discovered in SaaS Base Application 24.4

Thanks

Thank you @ArthurHardCoding for the detailed report and examples!