Exclude broken link to snowflake API docs (#2781)

Signed-off-by: Jo Stichbury <jo_stichbury@mckinsey.com>

docs/source/conf.py

@@ -224,7 +224,8 @@
     "https://github.com/kedro-org/kedro/blob/main/kedro/framework/project/default_logging.yml",
     "https://github.com/kedro-org/kedro/blob/main/README.md#the-humans-behind-kedro",  # "anchor not found" but is valid
     "https://opensource.org/license/apache2-0-php/",
-    "https://docs.github.com/en/rest/overview/other-authentication-methods#via-username-and-password"
+    "https://docs.github.com/en/rest/overview/other-authentication-methods#via-username-and-password",
+    "https://docs.snowflake.com/en/developer-guide/snowpark/reference/python/api/snowflake.snowpark.DataFrameWriter.saveAsTable.html"
 ]
 
 # retry before render a link broken (fix for "too many requests")