Merge pull request #265415 from v-luckywang/0201-Update_adf_snowflake_v2

[New feature] - Update Snowflake v2 connector doc in ADF

Author: v-dirichards

articles/data-factory/TOC.yml

@@ -608,7 +608,11 @@ items:
     - name: Smartsheet
       href: connector-smartsheet.md
     - name: Snowflake
-      href: connector-snowflake.md
+      items:
+      - name: Snowflake
+        href: connector-snowflake.md
+      - name: Snowflake (legacy)
+        href: connector-snowflake-legacy.md
     - name: Spark
       href: connector-spark.md
     - name: SQL Server