(fix): snippet templates for discriminated unions specify template_inputs (#3808)

Author: dsinghvi

generators/python/sdk/CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.9.3] - 2024-06-06
+
+- Fix: Snippet templates for discrminated unions now specify the `template_input` property which is 
+  required to actually see snippets of instantiating discrminated unions. 
+
 ## [2.9.2] - 2024-06-06
 
 - Fix: downgrades mypy so we can run it over all our files without concern for their pydantic bug

generators/python/sdk/VERSION

@@ -1 +1 @@
-2.9.2
+2.9.3

generators/python/src/fern_python/snippet/snippet_template_factory.py

@@ -445,6 +445,7 @@ def _get_discriminated_union_template(
                 discriminant_field=union_declaration.discriminant.wire_value,
                 template_string=f"{name}={self.TEMPLATE_SENTINEL}" if name is not None else f"{self.TEMPLATE_SENTINEL}",
                 members=member_templates,
+                template_input=PayloadInput(location="RELATIVE"),
             )
         )