docs: guide - add link to tables and traits (#5001)

* add link to tables and traits

* link to md file rather than html

Co-authored-by: Icxolu <[email protected]>

---------

Co-authored-by: Icxolu <[email protected]>

Author: jonaspleyer

guide/src/conversions.md

@@ -1,3 +1,5 @@
 # Type conversions
 
 In this portion of the guide we'll talk about the mapping of Python types to Rust types offered by PyO3, as well as the traits available to perform conversions between them.
+
+See also the conversion [tables](conversions/tables.md) and [traits](conversions/traits.md).