Add changelog for v5

docs/changelog.md

@@ -5,29 +5,30 @@ sidebar_position: 12
 # Versions & changelog
 
 
-# Versioning
+## Versioning
 
 Our versioning policy follows the [Semantic Versioning specification](https://semver.org/). 
 In our case, given a version `MAJOR.MINOR.PATCH`, we increment the:
 
 * `MAJOR` version when the data model of the Graph changes
-* `MINOR` version when the pipeline (e.g., different deduplication method, different implementation for an enrichment process) or the data sources change
+* `MINOR` version when the pipeline (e.g., different deduplication method, different implementation for an enrichment process) or major data sources change
 * `PATCH` version when the graph data are updated
 
 
-# Changelog
+## Changelog
 
 This section will document all notable changes for each graph version.
 
 
-## v5.0.0 - [date]
+### v5.0.0
 
-### Added
+#### Added
 
-### Changed
+- Impact indicators at the level of the [result instance](/data-model/entities/result#instance)
 
-### Deprecated
+- New [relationship types](/data-model/relationships#relationship-types): `Reviews, IsReviewedBy, IsParentOf, IsChildOf, References, IsReferencedBy, IsNewVersionOf, IsPreviousVersionOf, HasVersion, IsVersionOf, Cites, IsCitedBy, IsVariantFormOf, IsOriginalFormOf, Obsoletes, IsObsoletedBy, IsContinuedBy, Continues, Documents, IsDocumentedBy, IsCompiledBy, Compiles, IsPartOf, HasPart, IsSourceOf, IsDerivedFrom, IsIdenticalTo`
 
-### Removed
+#### Changed
+
+- FOS and SDGs were removed from the [result subjects](/data-model/entities/result#subjects)
 
-### Fixed