Update docs/evaluation/tutorials/backtesting.mdx

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

docs/evaluation/tutorials/backtesting.mdx

@@ -6,7 +6,7 @@ sidebar_position: 5
 
 Deploying your application is just the beginning of a continuous improvement process.
 Typically, you'll want to refine your system by enhancing prompts, language models, tools, and architectures.
-Backtesting involves assessing new versions of your application using this historical data and comparing the new outputs to the original ones.
+Backtesting involves assessing new versions of your application using historical data and comparing the new outputs to the original ones.
 This approach can offer a clearer indication of whether the new version is an improvement over the current deployment compared to evaluations using pre-production datasets.
 
 Here are the basic steps for backtesting: