Update toc.yml

Author: guywi-ms

articles/azure-monitor/toc.yml

@@ -184,15 +184,15 @@ items:
         href: essentials/data-collection-transformations-structure.md
       - name: Transformation tutorials
         items:
-        - name: Workspace transformations
+        - name: Workspace transformation
           items:
           - name: Azure portal
             displayName: Workspace transformations
             href: logs/tutorial-workspace-transformations-portal.md
           - name: Resource Manager templates
             displayName: Workspace transformations
             href: logs/tutorial-workspace-transformations-api.md
-        - name: Text logs
+        - name: Text log transformation
           displayName: Custom text logs
           href: agents/azure-monitor-agent-transformation.md
   - name: Azure Monitor Agent