Update MTP wording in ToC (#1024)

Author: Youssef1313

docs/articles/vs-test-adapter/toc.yml

@@ -10,7 +10,7 @@
   href: Known-Problems.md
 - name: Configuration with runsettings
   href: Tips-And-Tricks.md
-- name: Microsoft Test Platform (MTP)
+- name: Microsoft.Testing.Platform (MTP)
   href: NUnit-And-Microsoft-Test-Platform.md
 - name: Trace And Debug Output
   href: Trace-and-Debug.md