Refer to specific commit in readme

Author: MattFisher

src/inspect_evals/docvqa/README.md

@@ -64,7 +64,7 @@ And associated example questions:
 * What percentage of cases can be prevented?
 * What could lead to blindness or stroke diabetes?
 
-The model is tasked to answer each question by referring to the image. The prompts are based on OpenAI's [simple-evals](https://github.com/openai/simple-evals/blob/main/drop_eval.py#L261C13-L283C91).
+The model is tasked to answer each question by referring to the image. The prompts are based on OpenAI's [simple-evals](https://github.com/openai/simple-evals/blob/294cb1f/drop_eval.py#L261C13-L283C91).
 
 ## Scoring