fix: enum values instead of names in testset synthesizers (#2137)

**Change**
Using Enum.value instead of Enum.name

It seems that value (description) for QueryStyle is more logical than
using names. The current name and value are almost identical, but this
might change in the future

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

Author: lovets18

ragas/src/ragas/testset/synthesizers/multi_hop/base.py

@@ -167,8 +167,8 @@ async def _generate_sample(
             persona=scenario.persona,
             themes=scenario.combinations,
             context=reference_context,
-            query_length=scenario.length.name,
-            query_style=scenario.style.name,
+            query_length=scenario.length.value,
+            query_style=scenario.style.value,
         )
         response = await self.generate_query_reference_prompt.generate(
             data=prompt_input, llm=self.llm, callbacks=callbacks

ragas/src/ragas/testset/synthesizers/single_hop/base.py

@@ -128,8 +128,8 @@ async def _generate_sample(
             persona=scenario.persona,
             term=scenario.term,
             context=reference_context,
-            query_length=scenario.length.name,
-            query_style=scenario.style.name,
+            query_length=scenario.length.value,
+            query_style=scenario.style.value,
         )
         response = await self.generate_query_reference_prompt.generate(
             data=prompt_input, llm=self.llm, callbacks=callbacks