Use new ms.topic value

Author: davidbritch

Diff for: SkiaSharpAPI/docfx.json

@@ -51,7 +51,7 @@
       "searchScope": ["SkiaSharp API"],
       "uhfHeaderId": "MSDocsHeader-DotNet",
       "products": ["https://authoring-docs-microsoft.poolparty.biz/devrel/f0c462af-0ef9-4821-b36f-ba3d94736e2b"],
-      "ms.topic": "managed-reference",
+      "ms.topic": "reference",
       "feedback_system": "OpenSource",
       "feedback_github_repo": "mono/SkiaSharp-API-docs",
       "feedback_product_url": "https://developercommunity.visualstudio.com/",