chore: fix product neutral guides name (#16051)

Author: bshaffer

docfx/product-neutral-guides/docs.metadata.json.in

@@ -1,5 +1,5 @@
 {
     "language": "cpp",
-    "name": "product-neutral-guides",
+    "name": "help",
     "version": "@PROJECT_VERSION@"
 }