update ms.topic metadata (#215)

Author: sdwheeler

powershell-gallery/docfx.json

@@ -55,9 +55,9 @@
       "ms.topic": {
         "docs-conceptual/**/*": "conceptual",
         "docs-conceptual/**/how-to/**": "how-to",
-        "powershellget-1.x/**/*": "managed-reference",
-        "powershellget-2.x/**/*": "managed-reference",
-        "powershellget-3.x/**/*": "managed-reference"
+        "powershellget-1.x/**/*": "reference",
+        "powershellget-2.x/**/*": "reference",
+        "powershellget-3.x/**/*": "reference"
       },
       "products": {
         "docs-conceptual/**/*": [