Fix typo in Slack Docs (#1369)

docs/website/docs/dlt-ecosystem/verified-sources/slack.md

@@ -70,7 +70,7 @@ To get started with your data pipeline, follow these steps:
 
    [This command](../../reference/command-line-interface) will initialize
    [the pipeline example](https://github.com/dlt-hub/verified-sources/blob/master/sources/slack_pipeline.py)
-   with Google Sheets as the [source](../../general-usage/source) and
+   with Slack as the [source](../../general-usage/source) and
    [duckdb](../destinations/duckdb.md) as the [destination](../destinations).
 
 1. If you'd like to use a different destination, simply replace `duckdb` with the name of your