Update docfx.json (dotnet#2453)

Open Publishing Operation Account · mairaw · commit be0f0bb6ddad · 2019-05-15T11:07:50.000-07:00
diff --git a/docfx.json b/docfx.json
@@ -5,7 +5,8 @@
       {
         "files": [
           "api/**/*.yml",
-          "api/**/*.md"
+          "api/**/*.md",
+          "breadcrumb/toc.yml"
         ],
         "exclude": [
           "api/overwrites/**",
