update blog link

README.md

@@ -16,7 +16,7 @@ It contains 408 prompt-response-pairs and 865 spans that are marked as hallucina
 
 A text span is marked as a hallucination when a generated output in the response is not supported by the data in the input prompt.
 
-You can read more about the creation of the dataset on [our blog](https://blueguardrails.com/blog/ragtruth-plus-plus-enhanced-hallucination-detection-benchmark).
+You can read more about the creation of the dataset on [our blog](https://www.blueguardrails.com/en/blog/ragtruth-plus-plus-enhanced-hallucination-detection-benchmark).
 
 ## Structure of the dataset