Prefer DocumentationNode.unifiedSymbol over DocumentationNode.symbol

Author: ethan-kusters

Sources/SwiftDocC/Infrastructure/DocumentationContext.swift

@@ -858,7 +858,7 @@ public class DocumentationContext: DocumentationContextDataProviderDelegate {
         var updatedNode = documentationCache[reference]!
 
         // Pull a matched article out of the cache and attach content to the symbol
-        let symbol = updatedNode.symbol
+        let symbol = updatedNode.unifiedSymbol?.documentedSymbol
         let foundDocumentationExtension = matches?.first
 
         updatedNode.initializeSymbolContent(