Fix link in debugging-schema-names.md (#3766)

## What are you changing in this pull request and why?

Found this bad link using the new link checker!

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website/docs/guides/legacy/debugging-schema-names.md

@@ -16,7 +16,7 @@ You can also follow along via this video:
 Do a file search to check if you have a macro named `generate_schema_name` in the `macros` directory of your project.
 
 #### I do not have a macro named `generate_schema_name` in my project
-This means that you are using dbt's default implementation of the macro, as defined [here](https://github.com/dbt-labs/dbt-core/blob/main/core/dbt/include/global_project/macros/get_custom_name/get_custom_schema.sql#L17-L30)
+This means that you are using dbt's default implementation of the macro, as defined [here](https://github.com/dbt-labs/dbt-core/blob/main/core/dbt/include/global_project/macros/get_custom_name/get_custom_schema.sql#L47C1-L60)
 
 ```sql
 {% macro generate_schema_name(custom_schema_name, node) -%}