Update index.md

Author: emmamarichal

gf-guide/index.md

@@ -119,7 +119,9 @@ Advanced content for experienced contributors or team members with the details o
 * <mark class="brown">team&nbsp;</mark>
   [Article file](article.md)
 * <mark class="brown">team&nbsp;</mark>
-  [Onboarder workflow guide](onboarder-workflow.md) 
+  [Onboarder workflow guide](onboarder-workflow.md)
+* <mark class="brown">team&nbsp;</mark>
+  [Tagging process](tags.md)  
 * <mark class="grey">templ</mark>
   [Designer Profile](profile.md) 
 * <mark class="grey">templ</mark>