fix tutorial link

Author: BillWagner

docs/csharp/toc.yml

@@ -193,7 +193,7 @@ items:
   - name: Explore string interpolation - in your environment
     href: tutorials/exploration/interpolated-strings-local.md
   - name: Explore patterns in objects
-    href: whats-new/tutorials/patterns-objects.md
+    href: tutorials/patterns-objects
   - name: Advanced scenarios for string Interpolation
     href: tutorials/string-interpolation.md
   - name: Console Application