Update SUMMARY.md

Author: Maja4Dev

docs/SUMMARY.md

@@ -2,7 +2,7 @@
 
 - [Quick Start Guide](./quickstart.md)
 - [Introduction](./introduction.md)
-- [Definitions](./faqs.md) 
+- [Definitions / FAQ](./faqs.md) 
 - [Data Collection Guidelines](./collection.md)
 - [Validation Process](./validation.md)
 - [Data Model incl. Core Schemas](./data_model.md)