use ref for docs contributing guide

Signed-off-by: nikki everett <[email protected]>

docs/integrations/index.md

@@ -5,7 +5,7 @@
 Flyte is designed to be highly extensible and can be customized in multiple ways.
 
 ```{note}
-Want to contribute an example? Check out the [Documentation contribution guide](https://docs.flyte.org/en/latest/flytesnacks/contribute.html).
+Want to contribute an example? Check out the {ref}`Documentation contribution guide <contribute_docs>`.
 ```
 
 ## Flytekit Plugins