fix: Unlink UPDATE and DELETE keywords pending dml.md update

The `#update` and `#delete` anchors do not exist on
`reference/sql/dml.md`, only `#insert` and `#merge-into` do. Removing
the broken anchors here unblocks the Deploy check; the dml.md page
needs a separate update to add UPDATE and DELETE sections describing
the new behavior added in spiceai/spiceai#10747 for write-capable
connectors.

Author: lukekim

website/docs/components/data-connectors/snowflake.md

@@ -217,7 +217,7 @@ The connector supports password-based and [key-pair](https://docs.snowflake.com/
 
 ## Write Support
 
-This connector supports writing data to Snowflake tables using SQL [`INSERT INTO`](../../reference/sql/dml#insert), [`UPDATE`](../../reference/sql/dml#update), and [`DELETE FROM`](../../reference/sql/dml#delete) statements.
+This connector supports writing data to Snowflake tables using SQL [`INSERT INTO`](../../reference/sql/dml#insert), `UPDATE`, and `DELETE FROM` statements.
 
 To enable writes, set `access: read_write` on the dataset: