Merge pull request #222783 from jonburchel/2023-01-03-update-TOC

Update TOC with corrected link

Author: v-shils

articles/data-factory/TOC.yml

@@ -680,7 +680,7 @@ items:
       href: control-flow-azure-function-activity.md
       displayName: timeout, control flow
     - name: Custom activity
-      href: transform-data-using-dotnet-custom-activity.md
+      href: transform-data-using-custom-activity.md
     - name: Databricks Jar activity
       href: transform-data-databricks-jar.md
       displayName: data bricks