Update include patterns in ci.docfx.json

Removed PDF files from the include patterns.

Author: dellis1972

ci.docfx.json

@@ -41,8 +41,6 @@
           "roadmap/**/*.md",
           "roadmap/**/*.yml",
           "errors/**/*.md",
-          "pdf/**/*.md",
-          "pdf/**/*.yml",
           "toc.yml",
           "*.md"
         ],
@@ -96,4 +94,4 @@
       "changefreq": "monthly"
     }    
   }
-}
+}