[cogsvcs] Added container image tag listing

Author: IEvangelist

articles/cognitive-services/TOC.yml

@@ -18,6 +18,8 @@
   items:
   - name: Container support
     href: cognitive-services-container-support.md
+  - name: Container image tags
+    href: ./containers/container-image-tags.md
   - name: Container FAQ
     href: ./containers/container-faq.md
   - name: Container recipes